Subtitles section
Repeat sentence
Subtitles mode
Full screen
Previous
Next
x 1.0
Playback speed
More

How a Differential works ?

Video vocabulary

would

Copy vocabulary

US / wʊd /

UK / wʊd /

A1
  • other
  • Used to indicate something imagined
  • Used to ask or request something politely
  • Verb used to indicate possibility, request etc.
  • Used to indicate a preference
  • Used to indicate a reaction
  • Indicates something that occurred repeatedly
  • Used to indicate willingness or ability to do

compare

Copy vocabulary

US / kəm'peə(r) /

UK / kəmˈpɛr /

A1
  • verb
  • To consider how similar and different things are

achieve

Copy vocabulary

US / ə'tʃi:v /

UK / əˈtʃiv /

A2
  • verb
  • To succeed in doing good, usually by working hard

single

Copy vocabulary

US / 'sɪŋɡl /

UK / ˈsɪŋɡəl /

A1
  • adjecitve
  • Being one only, without others
  • Only; merely
  • Not married or in a relationship
  • noun
  • One run in cricket or a hit baseball
  • An individual song from a CD or album
  • Person who is not married or in a relationship

good

Copy vocabulary

US / ɡʊd /

UK / ɡʊd /

A1
  • adjecitve
  • Proper, appropriate or right
  • (Of an amount) enough; plenty
  • Excellent; high quality
  • Acting well or properly; of moral character
  • In a positive or happy emotional state
  • noun
  • Advantage or benefit

but

Copy vocabulary

US / bət /

UK / bʌt,bət /

A1
  • conjunction
  • Used before you say something different, opposite

not

Copy vocabulary

US / nɒt /

UK / nɑt /

A1
  • adverb
  • Word indicating the negative
  • (Used to form the negative of verbs)

effect

Copy vocabulary

US / ɪ'fekt /

UK / ɪˈfɛkt /

A1
  • noun
  • An advantage, benefit
  • Change brought about by a cause; result

video

Copy vocabulary

US / 'vɪdɪəʊ /

UK / ˈvɪdiˌo /

A2
  • adjecitve
  • Of a moving film, with sound
  • noun
  • Recording capturing action with sound
  • verb
  • To make a moving film of, with sound

usually

Copy vocabulary

US / ˈju:ʒuəli /

UK / ˈjuːʒuəli /

A1
  • adverb
  • Normally; regularly

sum

Copy vocabulary

US / sʌm /

UK / sʌm /

A2
  • noun
  • Amount when all is added together; total
  • verb
  • To add two or more numbers together; total

now

Copy vocabulary

US / naʊ /

UK / naʊ /

A1
  • adverb
  • At the present time or moment
  • Right away or in the next possible moment
  • Used to refer to something that just happened
  • Time between the present and a moment in the past
  • conjunction
  • Resulting from or because of something

same

Copy vocabulary

US / seɪm /

UK / sem /

A1
  • adjecitve
  • Being equal in quality and amount
  • Identical; not different
  • Not changing; constant

role

Copy vocabulary

US / rəʊl /

UK / rol /

A2
  • noun
  • Character played by an actor
  • Part you play in an activity; job; responsibility

assembly

Copy vocabulary

US / ə'semblɪ /

UK / əˈsɛmbli /

B1
  • noun
  • Process of putting the parts of something together
  • Group of people gathered for a purpose
  • A group of machine parts forming a tool or machine

carry

Copy vocabulary

US / ˈkæri /

UK / ˈkæri /

A1
  • verb
  • To have a child, be pregnant
  • To have a disease you might give to others
  • (Of stores) to sell a particular product
  • To hold something and move it to another place
  • To travel a long distance (sound)
  • To support the weight or burden of something

send

Copy vocabulary

US / send /

UK / sɛnd /

A1
  • verb
  • To cause to behave or respond in a particular way
  • To cause mail or packages to go to another place
  • To move something quickly in a particular way
  • To give information or greetings to someone

difference

Copy vocabulary

US / 'dɪfrəns /

UK / ˈdɪfərəns, ˈdɪfrəns /

A1
  • noun
  • A thing or issue that people do not agree about
  • Not of the same kind; unlike other things

load

Copy vocabulary

US / ləʊd /

UK / lod /

A2
  • noun
  • Large, often heavy, amount of a thing to be moved
  • A burden; heavy responsibility
  • Many or much of something; a lot of
  • Items that fill a truck, machine
  • verb
  • To put in items for use (e.g. bullets in a gun)

velocity

Copy vocabulary

US / və'lɒsətɪ /

UK / vəˈlɑsɪti /

B1
  • noun
  • Speed in a given direction

well

Copy vocabulary

US / wel /

UK / wɛl /

A1
  • adjecitve
  • Being in a fortunate, good condition or state
  • Healthy and in good condition
  • adverb
  • In an acceptable, proper, or successful manner
  • In a complete, total, or full manner
  • A great and considerable degree
  • In a successful way, in a good or satisfactory way
  • exclamation
  • Used to begin or continue a particular statement
  • Used to show you want to start saying something
  • Used to express that you are waiting for a reply
  • You say this to change the topic of a conversation
  • Used to indicate you are making a final remark
  • noun
  • Long deep hole in the ground to get water
  • verb
  • To cause your eyes to fill with tears

multiplication

Copy vocabulary

US / ˌmʌltɪplɪˈkeɪʃn /

UK / ˌmʌltəplɪˈkeʃən /

B1
  • noun
  • Increase in the number of something
  • Process of multiplying one number by another

limited

Copy vocabulary

US / ˈlɪmɪtɪd /

UK / ˈlɪmɪtɪd /

B1
  • adjecitve
  • (Of a company) with a limit of financial liability
  • With restrictions; not broad in scope
  • verb
  • To stop or prevent an increase past a point

situation

Copy vocabulary

US / ˌsɪtʃuˈeɪʃn /

UK / ˌsɪtʃuˈeʃən /

A1
  • noun
  • Place, position or area that something is in
  • Circumstance or condition surrounding an event
  • An unexpected problem or difficulty

negotiate

Copy vocabulary

US / nɪˈgəʊʃieɪt /

UK / nɪˈgoʊʃieɪt /

B1
  • verb
  • To have a formal discussion to reach an agreement
  • To manage a difficult task or path successfully

vehicle

Copy vocabulary

US / ˈvi:əkl /

UK / ˈvi:hɪkl /

A2
  • noun
  • Machine (such as a car) used to carry things
  • Means of expressing, showing, or achieving

standard

Copy vocabulary

US / 'stændəd /

UK / ˈstændəd /

A2
  • adjecitve
  • Being the accepted normal level of quality
  • (Of a language) being the most accepted in a place
  • noun
  • Official unit of measuring something
  • Principle of behaving in a moral way

capable

Copy vocabulary

US / 'keɪpəbl /

UK / ˈkepəbəl /

A2
  • adjecitve
  • Being able to do something very well; proficient

through

Copy vocabulary

US / θru: /

UK / θru /

A2
  • adjecitve
  • having finished using or doing something
  • adverb
  • From the beginning of something until the end
  • preposition
  • Over, in, across an entire thing or place
  • Allowing you to pass between, or to
  • By a particular way or process; by the use of

solid

Copy vocabulary

US / 'sɒlɪd /

UK / ˈsɑlɪd /

A2
  • adjecitve
  • Being able to be trusted; reliable
  • Substance that is hard or of fixed shape
  • Being well made and expected to last long
  • Having no space or emptiness inside
  • Being made entirely of one material or substance
  • noun
  • Something firm or hard; not gas or liquid

for

Copy vocabulary

US / fə(r) /

UK / fɔr,fə /

A1
  • preposition
  • Used to show the purpose, or need of something

differential

Copy vocabulary

US / ˌdɪfəˈrenʃl /

UK / ˌdɪfəˈrɛnʃəl /

B2
  • adjecitve
  • Different, as in treatment; discriminatory
  • noun
  • A gear to let back wheels spin at different speeds

slippery

Copy vocabulary

US / ˈslɪpəri /

UK / ˈslɪpəri /

B1
  • adjecitve
  • Difficult to hold or stand as it's smooth/wet/icy
  • Hard to pin down; avoiding telling facts; evasive
  • (Person) untrustworthy

ingenious

Copy vocabulary

US / ɪnˈdʒi:niəs /

UK / ɪnˈdʒinjəs /

B2
  • adjecitve
  • Very good at making things or solving problems

mean

Copy vocabulary

US / mi:n /

UK / min /

A1
  • adjecitve
  • Being good at
  • Nasty; unkind
  • Not liking to spend money; cheap; stingy
  • noun
  • Average of a set of numbers
  • verb
  • To express a particular idea or thought
  • To intend to do something in particular
  • To have a particular meaning or value

case

Copy vocabulary

US / keɪs /

UK / kes /

A1
  • noun
  • Container used to carry things, e.g. clothes
  • Set of facts about a crime
  • Set of facts about an event
  • Example or instance of something
  • verb
  • To find out about a place, as in planning to steal

right

Copy vocabulary

US / raɪt /

UK / raɪt /

A1
  • adjecitve
  • Correct or true
  • The south side of you looking at the rising sun
  • adverb
  • Exactly in a place or time
  • Being appropriate for a particular event
  • In a straight or direct manner
  • noun
  • Something you are legally or morally allowed to do
  • Ideal of what is just and good
  • Political view based on conservatism
  • verb
  • To fix something previously wrong or unjust
  • To make upright, as a boat that has turned over

track

Copy vocabulary

US / træk /

UK / træk /

A2
  • noun
  • A circular course for running
  • Course or way someone takes, e.g. in education
  • Path in a field or a forest made by walkers
  • Often circular course laid out for car racing
  • One of multiple musical recordings on an album
  • Band surrounding the wheels of a tank
  • Metal lines that trains ride on
  • verb
  • To use marks to follow a wild animal
  • To move a certain way/follow a particular course
  • To record and examine the progress of something

torque

Copy vocabulary

US / tɔ:k /

UK / tɔrk /

B2
  • noun
  • Turning or twisting force

step

Copy vocabulary

US / step /

UK / stɛp /

A1
  • noun
  • Movement done as part of a particular dance
  • Distance covered by one movement of a leg; stride
  • One part or stage in a process
  • Sound made by the feet while walking; footstep
  • Flat horizontal piece that forms stairs
  • verb
  • To raise and moving the foot to put it down

arrangement

Copy vocabulary

US / əˈreɪndʒmənt /

UK / əˈrendʒmənt /

A2
  • noun
  • Particular design of a device
  • Piece of music written for a particular instrument
  • Group of things organized in a particular way
  • Organized plan, event for a time and place
  • Action done in order for something to happen

traction

Copy vocabulary

US / ˈtrækʃn /

UK / ˈtrækʃən /

C1
  • noun
  • Force causing moving thing to stick, e.g. on roads

shaft

Copy vocabulary

US / ʃɑ:ft /

UK / ʃæft /

B2
  • noun
  • Vertical, sloping passageway leading to a surface
  • verb
  • To ruin the plans or prospects of others

rotation

Copy vocabulary

US / rəʊˈteɪʃn /

UK / roʊˈteɪʃn /

B2
  • noun
  • Regular change of the crops grown in a field
  • Group who take turns performing a certain task
  • Regularly changing the time when people work
  • Movement in a circle around a central point

get

Copy vocabulary

US / ɡet /

UK / ɡɛt /

A1
  • verb
  • To become affected by illness or disease
  • To begin to feel or understand an emotion or idea
  • To send or bring someone or something home, etc.
  • To go somewhere to obtain something
  • To (cause to) do a particular thing
  • To obtain, receive or be given something
  • To currently have
  • To prepare for use
  • To understand something being said or read

first

Copy vocabulary

US / fɜ:st /

UK / fɚst /

A1
  • adjecitve
  • 1st; Coming before all others in time or place
  • noun
  • Something that has not happened before
  • Position of the winner of a competition

interesting

Copy vocabulary

US / ˈɪntrəstɪŋ /

UK / ˈɪntrɪstɪŋ, -tərɪstɪŋ, -təˌrɛstɪŋ /

A1
  • adjecitve
  • Taking your attention; making you want to know
  • verb
  • To make someone want to know about something
  • To persuade to do, become involved with something

own

Copy vocabulary

US / əʊn /

UK / on /

A1
  • adjecitve
  • Belong to oneself
  • determiner
  • Yours, his, hers, etc.; not belonging to another
  • pronoun
  • (Something) belong to myself
  • verb
  • To have something as your property

that

Copy vocabulary

US / ðæt /

UK / ðæt, ðət /

A1
  • adjecitve
  • The person or thing being talked about
  • Used to identify something both the speakers know
  • adverb
  • Used to reinforce adjectives and adverbs
  • To such a degree
  • conjunction
  • Used to connect a noun clause
  • Used to introduce an adverbial clause
  • Used to introduce a noun clause
  • determiner
  • Used as a noun to refer to something
  • pronoun
  • Referring an object far away
  • Used to refer to the relative pronoun ‘which’

second

Copy vocabulary

US / 'sekənd /

UK / ˈsɛkənd /

A1
  • adjecitve
  • 2nd; the one following first
  • noun
  • Unit of time; one sixtieth of a minute
  • Short period of time that you wait for someone
  • (Do) soon

different

Copy vocabulary

US / ˈdɪfrənt /

UK / ˈdɪfrənt /

A1
  • adjecitve
  • Not of the same kind; unlike other things

accomplish

Copy vocabulary

US / ə'kʌmplɪʃ /

UK / əˈkɑmplɪʃ /

B1
  • verb
  • To succeed in doing; complete successfully

about

Copy vocabulary

US / ə'baʊt /

UK / əˈbaʊt /

A1
  • adverb
  • To be ready to; going to
  • Nearly; approximately; roughly
  • Near; next to; close to
  • In every direction; in the area of
  • preposition
  • Concerning or of (a topic)

unit

Copy vocabulary

US / ˈju:nɪt /

UK / ˈjunɪt /

B2
  • noun
  • One apartment in a building
  • Group of people, e.g. soldiers, that work together
  • A chapter of a textbook
  • A standard of measurement of something
  • Single item made by a company

spider

Copy vocabulary

US / ˈspaɪdə(r) /

UK / ˈspaɪdɚ /

B1
  • noun
  • Small creature with 8 legs that spins cobwebs

properly

Copy vocabulary

US / ˈprɔpəlɪ /

UK / ˈprɑːpərli /

A2
  • adverb
  • In an appropriate or correct manner

know

Copy vocabulary

US / nəʊ /

UK / noʊ /

A1
  • verb
  • To be familiar with a person or place, thing
  • To feel sure or be convinced about something
  • To discover or be aware of something
  • To be able to distinguish
  • To have knowledge of things

manage

Copy vocabulary

US / ˈmænɪdʒ /

UK / ˈmænɪdʒ /

A1
  • verb
  • To survive hardships and difficulties; to cope
  • To run or operate a business by directing others

gear

Copy vocabulary

US / ɡɪə(r) /

UK / ɡɪr /

B1
  • noun
  • A speed selector connected to an engine
  • Special clothes you use for a purpose
  • Toothed wheel shifting power from engine to wheels
  • verb
  • To aim at or prepare yourself for something

transfer

Copy vocabulary

US / træns'fɜ:(r) /

UK / trænsˈfɚ /

A2
  • noun
  • Moving to a different place, job, or school
  • Act of giving the right to a property to another
  • Picture that is pressed to copy it onto something
  • Use of ideas or skills in a different situation
  • Ticket allowing you to get on another plane, bus
  • verb
  • To move to a different place, job or school
  • To give someone an illness through contact
  • To give someone your right to a property
  • To move something from one place to another
  • To use ideas or skills in a different situation
  • To get off a plane, bus etc. and get on another

part

Copy vocabulary

US / pɑ:t /

UK / pɑ:rt /

A1
  • adjecitve
  • To some degree; half; not fully
  • noun
  • Division of a book
  • Ratio of something, e.g. 3 of gin, 1 of tonic
  • A line in a person's hair, made with a comb
  • Character an actor plays on stage, movie, or TV
  • Some, but not all of a specific thing
  • Role in causing something to happen
  • verb
  • To make a line in a person's hair, by using a comb
  • To move two things apart creating a space
  • To leave someone, or to break off a relationship

mechanism

Copy vocabulary

US / 'mekənɪzəm /

UK / ˈmɛkəˌnɪzəm /

B1
  • noun
  • Part of a machine that performs a certain function
  • System or process for achieving a certain result

have

Copy vocabulary

US / həv /

UK / hæv /

A1
  • verb
  • To drink, smoke, eat or use something
  • To experience the effects of something
  • To organize an event, or join in an activity
  • To own, possess, or hold something
  • To cause to happen or produce a particular effect

rotational

Copy vocabulary

US / rəʊ'teɪʃənl /

UK / roʊ'teɪʃənl /

B2
  • adjecitve
  • Concerning rotation

via

Copy vocabulary

US / ˈvaɪə /

UK / ˈvaɪə, ˈviə /

B1
  • preposition
  • By the means of using something
  • By going through, by way of

with

Copy vocabulary

US / wɪð /

UK / wɪð, wɪθ /

A1
  • preposition
  • As an employee of a certain company
  • Against something or someone
  • By using something as a means
  • Due to; because of
  • Including
  • Possessing as a feature
  • Related to
  • (Of the manner/attitude by which you do something)
  • Used to express that people or things are together

problem

Copy vocabulary

US / ˈprɒbləm /

UK / ˈprɑbləm /

A1
  • adjecitve
  • Causing trouble
  • noun
  • Something difficult to deal with or causes trouble
  • Question to show understanding of a math concept

clear

Copy vocabulary

US / klɪə(r) /

UK / klɪr /

A1
  • adjecitve
  • Empty; without anything in it or on it
  • Being certain and without doubt
  • Being without any streaks, spots, or cracks
  • Easy to understand; well-explained; obvious
  • adverb
  • Completely; entirely; through the whole of
  • Away from; free from
  • verb
  • To recover from or remove a problem
  • To get rid of the entire contents of
  • To give permission for something to happen
  • To make a place or surface empty by removing
  • To prove that someone is not guilty or to blame

surface

Copy vocabulary

US / 'sɜ:fɪs /

UK / ˈsɚfəs /

A2
  • adjecitve
  • Of the top layer; not deep or meaningful
  • noun
  • Top layer of the ground or of water
  • Nature or emotions that show, but may not be true
  • Outside or upper layer of something
  • verb
  • To give (road) a top layer
  • To appear after being hidden, unseen, or unknown
  • To come to the top of something; emerge
  • To come to the top level of water, mud, etc.

able

Copy vocabulary

US / 'eɪbl /

UK / ˈebəl /

A2
  • adjecitve
  • Skilled; good at something
  • Having the ability to do something

turn

Copy vocabulary

US / tɜ:n /

UK / tɚn /

A1
  • noun
  • Place where changing of direction happens
  • Your time or chance to perform a duty
  • Your chance to play or do in say a game
  • Unexpected change, as in the weather
  • verb
  • To become (a particular age)
  • To become a different quality, color, etc.
  • To change the direction of something, e.g. a car
  • To move in an opposite direction or position
  • To shape metal with a spinning tool

other

Copy vocabulary

US / 'ʌðə(r) /

UK / ˈʌðər /

A1
  • adjecitve
  • A thing different from that mentioned
  • determiner
  • (Something) else; not the first (one)
  • pronoun
  • Being the one and only thing of that category

pinion

Copy vocabulary

US / ˈpɪnjən /

UK / ˈpɪnjən /

A1
  • noun
  • Small wheel linking with a larger wheel or cog

power

Copy vocabulary

US / 'paʊə(r) /

UK / ˈpaʊɚ /

A1
  • noun
  • Legal or official right to perform certain actions
  • Ability to move forcefully and quickly
  • Energy of something (e.g. electricity or fuel)
  • Mathematical way to multiply a number
  • Condition of being in political control
  • Physical force, energy, and strength
  • verb
  • To give energy to something, e.g. by electricity
  • To move something forcefully and quickly

open

Copy vocabulary

US / 'əʊpən /

UK / ˈopən /

A1
  • adjecitve
  • Available for use; accessible
  • Not being hidden; available for others to see
  • Being available for customers to enter or use
  • Allowing everyone to use or take part in
  • Not secret anymore
  • Not closed or shut
  • Willing to accept new ideas and thoughts
  • noun
  • Name for a tennis or golf competition
  • verb
  • To make accessible or able to be used, e.g. road
  • To start the activities or services of a business
  • To make a space or hole appear in something
  • To move or change so that it is no longer closed
  • To start something, e.g. a new business

one

Copy vocabulary

US / wʌn /

UK / wʌn /

A1
  • pronoun
  • You; we; people in general; someone
  • The thing or person previously referred to
  • adjecitve
  • Used to refer to people generally
  • Being a strong example of (something mentioned)
  • number
  • Number 1

order

Copy vocabulary

US / 'ɔ:də(r) /

UK / ˈɔrdɚ /

A1
  • noun
  • Religious or social group, as of nuns
  • Instructions to others to do what you want
  • State in which things are neat and organized
  • What you ask to buy, e.g. food in restaurant
  • Social or political control of an area
  • verb
  • To put things in a sequence, e.g. a, b, c
  • To give instructions to others to do what you want
  • To ask for something you want to buy, e.g. a meal

make

Copy vocabulary

US / meɪk /

UK / mek /

A1
  • noun
  • Product made by a particular company; brand
  • verb
  • To arrange or prepare something e.g. dinner
  • To get to (a place) on time
  • To gain the status of (teacher, lawyer, etc.)
  • To create something by putting things together
  • To earn a certain amount of money at a job
  • To cause or force a person to do something
  • To cause something to happen or be formed

this

Copy vocabulary

US / ðɪs /

UK / ðɪs /

A1
  • adjecitve
  • Used to indicate something already been discussed
  • Used to indicate something happening around now
  • adverb
  • An indication by a physical motion or gesture
  • A specific amount of
  • determiner
  • Person, thing, or idea near you
  • pronoun
  • Person, thing that has already been discussed

play

Copy vocabulary

US / pleɪ /

UK / pleɪ /

A1
  • noun
  • Loose, free movement between two objects
  • Single action in a sports game
  • Performance in which people act in a theater
  • verb
  • To act as a character in a movie, or on stage
  • To perform music on an instrument
  • To use a device, e.g. a video game
  • To do something for enjoyment and fun
  • To do or perform a game or sport

free

Copy vocabulary

US / fri: /

UK / fri /

A1
  • adjecitve
  • Living, happening without being controlled
  • Costing no money
  • Not working; not busy
  • verb
  • To release (e.g. bird) from a cage or prison

the

Copy vocabulary

US / ðə /

UK / ðə /

A1
  • article
  • Used to refer to something already mentioned
  • Used to show there is only one of something
  • determiner
  • Used to describe all of a family

rpm

Copy vocabulary

US / ˌɑ: pi: ˈem /

UK / ˌɑ:r /

A1
  • abbreviation
  • Revolutions per minute

receive

Copy vocabulary

US / rɪ'si:v /

UK / rɪˈsiv /

A1
  • verb
  • To get something someone has given or sent to you
  • To allow someone to become a member (of a club)
  • To welcome someone as a guest into your home
  • To respond to (e.g. news) in a particular way

let

Copy vocabulary

US / let /

UK / lɛt /

A1
  • verb
  • To allow someone to do something
  • Introducing a suggestion to do something together
  • To rent a house, etc. to others

opposite

Copy vocabulary

US / ˈɔpəzit /

UK / ˈɑpəzɪt /

A2
  • adjecitve
  • Being totally different from
  • noun
  • Person, thing that is totally different to another
  • preposition
  • Across from or on the side facing something

you

Copy vocabulary

US / jʊ /

UK / ju /

A1
  • pronoun
  • Person someone is speaking or writing to
  • Person or people in general

kind

Copy vocabulary

US / kaɪnd /

UK / kaɪnd /

A1
  • adjecitve
  • In a caring and helpful manner
  • friendly and considerate
  • noun
  • One type of thing

how

Copy vocabulary

US / haʊ /

UK / haʊ /

A1
  • adjecitve
  • To what degree? in what amount?
  • adverb
  • (Used to explain the way to do something)
  • exclamation
  • For what purpose or reason?
  • (Used to ask someone or something's condition)

also

Copy vocabulary

US / 'ɔ:lsəʊ /

UK / ˈɔlso /

A1
  • adverb
  • In addition; too; in a similar way

spin

Copy vocabulary

US / spɪn /

UK / spɪn /

B1
  • noun
  • A dizzy feeling your head is turning around
  • A slant or hidden purpose, as in politicians' talk
  • A movement in a rapid turning motion
  • verb
  • To make a ball rotate when throwing it
  • To feel dizzy/confused, as in my head is spinning
  • To convert material such as cotton into thread
  • To move something in a rapid turning motion

manner

Copy vocabulary

US / ˈmænə(r) /

UK / ˈmænɚ /

A2
  • noun
  • The way a person acts, talks, or behaves
  • Polite and respectful behavior to others
  • The way that something happens or is done

use

Copy vocabulary

US / ju:s /

UK / ju:s /

A1
  • noun
  • Ability to employ something
  • Need to enable it to work
  • Permission to do something with something
  • Act of spending money
  • Operation of a machine for its function
  • verb
  • To have; to eat, drink, consume etc.
  • To need to operate or work
  • To operate a machine, e.g. a computer
  • To treat a person badly
  • To do something with, for a task or purpose

mesh

Copy vocabulary

US / meʃ /

UK / mɛʃ /

B2
  • noun
  • Crisscrossed wires to allow air/liquid through

integral

Copy vocabulary

US / ˈɪntɪgrəl /

UK / ˈɪntɪɡrəl, ɪnˈtɛɡrəl /

B1
  • adjecitve
  • Being an essential part of something; necessary

straight

Copy vocabulary

US / streɪt /

UK / stret /

A2
  • adjecitve
  • Not having curves, bends, or angles
  • Not gay; heterosexual
  • honest and direct
  • adverb
  • in a line; immediately; honestly and directly

separate

Copy vocabulary

US / 'sepəreɪt /

UK / 'sepəreɪt /

A2
  • adjecitve
  • Being different from or unrelated to another
  • verb
  • To divide two things by being in between them
  • To live away from your husband or wife
  • To move things away from each other

flow

Copy vocabulary

US / fləʊ /

UK / flo /

A2
  • noun
  • Amount of something that moves through an area
  • verb
  • To move steadily and easily in a certain direction

consider

Copy vocabulary

US / kən'sɪdə(r) /

UK / kənˈsɪdər /

A1
  • verb
  • To think carefully about something

while

Copy vocabulary

US / waɪl /

UK / hwaɪl, waɪl /

A1
  • conjunction
  • In spite of the fact that; although
  • During the time that; at the same time
  • noun
  • Short amount of time

four

Copy vocabulary

US / fɔ:(r) /

UK / fɔr, for /

A1
  • number
  • 4

here

Copy vocabulary

US / hɪə(r) /

UK / hɪr /

A1
  • adverb
  • In this place; at this location, position or time

wheel

Copy vocabulary

US / wi:l /

UK / wi:l /

A2
  • noun
  • Round thing that rolls, used for moving things
  • verb
  • To move something which has wheels or is on wheels
  • To turn or cause to turn something in a circle

side

Copy vocabulary

US / saɪd /

UK / saɪd /

A1
  • adjecitve
  • In addition to the central or most important thing
  • Next to, or very close to, the right or left of
  • noun
  • Position or opinion that is opposite to another
  • Right or left part of a person's body
  • Feature of someone's personality
  • Straight edge of an object
  • One of two or more groups fighting each other
  • verb
  • To decide to agree with one point, not the other

will

Copy vocabulary

US / wɪl /

UK / wɪl /

A1
  • noun
  • Desire or choice of someone
  • Document saying who gets your money when you die
  • Strong desire to do something; determination
  • Desire to do something; strong wish to do
  • other
  • Used with verbs to express the future
  • verb
  • To leave property to someone after your death
  • To use mental effort to make something happen
  • Am (is, are) likely to do
  • To influence someone to do something
  • To make something happen by strongly wanting it

spinning

Copy vocabulary

US / ˈspɪnɪŋ /

UK / ˈspɪnɪŋ /

B1
  • verb
  • To make a ball rotate when throwing it
  • To feel dizzy / confused / light headed
  • To convert material such as cotton into thread
  • To move something in a rapid turning motion

overcome

Copy vocabulary

US / ˌəʊvə'kʌm /

UK / ˌovɚˈkʌm /

A2
  • verb
  • To succeed in a struggle against; defeat

combine

Copy vocabulary

US / kəmˈbaɪn /

UK / kəmˈbaɪn /

A2
  • verb
  • To mix several things together to form one thing

exactly

Copy vocabulary

US / ɪgˈzæktli /

UK / ɪɡˈzæktli /

A1
  • adverb
  • No more and no less than; precisely

axis

Copy vocabulary

US / ˈæksɪs /

UK / ˈæksɪs /

B1
  • noun
  • A line about which a rotating body turns

thank

Copy vocabulary

US / θæŋk /

UK / θæŋk /

A1
  • verb
  • To tell someone you are grateful to them

travel

Copy vocabulary

US / ˈtrævl /

UK / ˈtrævəl /

A1
  • noun
  • Going to other places, esp. distant places
  • verb
  • To go to a place that is far away

simple

Copy vocabulary

US / 'sɪmpl /

UK / ˈsɪmpəl /

A1
  • adjecitve
  • Not hard to understand or do; not complex
  • Having only a few parts; not complex
  • Being ordinary or normal
  • Being plain; without a lot added for style

show

Copy vocabulary

US / ʃəʊ /

UK / ʃo /

A1
  • noun
  • False display of love, emotion or action
  • An event for displaying or promoting goods
  • Play, opera or theater production
  • Presentation that is broadcast on TV or radio
  • verb
  • To be easily seen or displayed
  • To display your emotions or feelings
  • To let someone see something; display
  • To explain or teach how something is done
  • To lead someone somewhere; point them to something
  • To prove something to be true, correct
  • To reveal or allow something to be seen

result

Copy vocabulary

US / rɪ'zʌlt /

UK / rɪˈzʌlt /

A2
  • noun
  • Something produced through tests or experiments
  • Final score of a competition, election or game
  • verb
  • To be the outcome of other causes and effects

both

Copy vocabulary

US / bəuθ /

UK / boθ /

A1
  • determiner
  • Used to refer to two things at the same time
  • pronoun
  • Used to refer to two things at the same time

take

Copy vocabulary

US / teɪk /

UK / tek /

A1
  • noun
  • Filming of a single scene for TV or the movies
  • verb
  • To accept something that is offered
  • To use a method of traveling, e.g. a bus or train
  • To use a camera to make (a photo)
  • To pick up something and go away with it
  • To study a subject in school
  • To attempt to pass (an exam)
  • To require a certain amount of time, money, space

add

Copy vocabulary

US / æd /

UK / æd /

A1
  • verb
  • To include as well
  • To put two things or numbers together, e.g. 2+2

work

Copy vocabulary

US / wɜ:k /

UK / wɚk /

A1
  • adjecitve
  • Activity completed in order to make money
  • noun
  • The product of some artistic or literary endeavor
  • Everything created by an author, artist, musician
  • Activity you do in order to make money
  • Place of employment
  • Final product or result of a some labor or effort
  • verb
  • To bring into a specific state of success
  • To be functioning properly, e.g. a car
  • To do your job in your company or workplace
  • To make an effort to do something
  • To operate a machine or device

heavy

Copy vocabulary

US / 'hevɪ /

UK / ˈhɛvi /

A1
  • adjecitve
  • Greater in amount, degree, or severity than usual
  • Involving serious or strong emotions
  • Having a lot of weight

configuration

Copy vocabulary

US / kənˌfɪgəˈreɪʃn /

UK / kənˌfɪɡjəˈreʃən /

B2
  • noun
  • A shape or outline; a method of arrangement

its

Copy vocabulary

US / ɪts /

UK / ɪts /

A1
  • adjecitve
  • Referring to or belonging to ‘it’
  • determiner
  • Of something; belonging or related to something
  • other
  • Possessive form of “it”

engine

Copy vocabulary

US / 'endʒɪn /

UK / ˈɛndʒɪn /

A2
  • noun
  • Machine that changes energy into mechanical motion
  • The part of a train that pulls railway cars

all

Copy vocabulary

US / ɔ:l /

UK / ɔl /

A1
  • adverb
  • Completely; totally
  • determiner
  • Being every one of something
  • pronoun
  • 100% of something; the complete amount

speed

Copy vocabulary

US / spi:d /

UK / spid /

A2
  • noun
  • How fast or slow something is or is done
  • verb
  • To move quickly when completing an action
  • To drive a vehicle faster than laws allow

main

Copy vocabulary

US / meɪn /

UK / men /

A1
  • adjecitve
  • Most important; most often used

introduce

Copy vocabulary

US / ˌɪntrəˈdju:s /

UK / ˌɪntrəˈdus, -ˈdjus /

A1
  • verb
  • To open an essay to set the scene
  • To guide or explain something, e.g. a town
  • To begin the use of a new thing or practice
  • To make someone known to another by name
  • To insert or put something inside another thing

way

Copy vocabulary

US / weɪ /

UK / we /

A1
  • adverb
  • Used to emphasize the amount of something
  • noun
  • Particular aspect of something being thought about
  • One of various choices that could be made
  • Particular existing condition or state
  • (Often long) distance or length of time
  • How something is done
  • Route to go to a place
  • Small street
  • Usual behavior, emotions or habits of someone

move

Copy vocabulary

US / mu:v /

UK / muv /

A1
  • noun
  • Act of moving a playing piece in chess, etc.
  • An action; doing something
  • Step taken to achieve a goal
  • verb
  • To cause someone to have certain emotions
  • To cause something to change to a different place
  • To change where people live or a business operates
  • To take action to do or achieve something

heart

Copy vocabulary

US / hɑ:t /

UK / hɑrt /

A1
  • noun
  • A feeling of care for others; compassion
  • Courage, confidence, and emotional strength
  • Be cheerfully encouraging
  • Most essential, important, or central part
  • Referring to a promise or something important
  • State or feelings of affection or deep love
  • Core part of a vegetable, e.g. a lettuce
  • The part of the body that pumps blood
  • Place where emotions are believed to be felt
  • A shape that represents love

direction

Copy vocabulary

US / də'rekʃn /

UK / dɪˈrɛkʃən, daɪ- /

A2
  • noun
  • When someone tells people what to do
  • Describes the way you are going, e.g. North

they

Copy vocabulary

US / ðeɪ /

UK / ðe /

A1
  • pronoun
  • Two or more people, animals, or things

slip

Copy vocabulary

US / slɪp /

UK / slɪp /

B1
  • noun
  • A field position in cricket
  • A quick escape or become free from something
  • Combination of clay and water, used in pottery
  • Occasion when something grows worse or drops lower
  • Minor mistake
  • Thin women's underwear to go under a dress
  • verb
  • To begin to fall as a result of losing balance
  • To escape or become free from something
  • To move from one state to another, usually worse
  • To slide out of place or fall to the ground
  • To occur or pass rapidly
  • To put something in a place quietly and secretly

animation

Copy vocabulary

US / ˌænɪˈmeɪʃn /

UK / ˌænəˈmeʃən /

B2
  • noun
  • Movie with drawn characters

reduction

Copy vocabulary

US / rɪ'dʌkʃn /

UK / rɪˈdʌkʃən /

B1
  • noun
  • Act of making something smaller
  • Amount that a price is decreased by

majority

Copy vocabulary

US / mə'dʒɒrətɪ /

UK / məˈdʒɔrɪti, -ˈdʒɑr- /

B1
  • noun
  • Amount that is more than half of a group

two

Copy vocabulary

US / tu: /

UK / tu /

A1
  • number
  • 2

distance

Copy vocabulary

US / 'dɪstəns /

UK / ˈdɪstəns /

A2
  • noun
  • Lack of friendliness toward another person
  • Amount of space between two places or things
  • verb
  • To make it clear that you are not involved

come

Copy vocabulary

US / kʌm /

UK / kʌm /

A1
  • verb
  • To arrive at a place
  • (Of mail) to be delivered
  • To move toward someone; go with someone
  • To reach a certain point or state

where

Copy vocabulary

US / hwɛə /

UK / hwɛr, wɛr /

A1
  • conjunction
  • At or in the place which
  • In whatever place
  • pronoun
  • Word you use to ask the location of something

leave

Copy vocabulary

US / li:v /

UK / liv /

A1
  • noun
  • Permission to do something
  • Vacation time; time off work
  • verb
  • To go away from; depart
  • To gift property to someone after you die
  • To allow something to continue happening
  • To let something remain unused or available
  • To let something or someone remain somewhere

far

Copy vocabulary

US / fɑ:(r) /

UK / fɑr /

A1
  • adjecitve
  • A long way away
  • Being a long way away
  • adverb
  • To a large degree or extent

peripheral

Copy vocabulary

US / pəˈrɪfərəl /

UK / pəˈrɪfərəl /

B2
  • adjecitve
  • Not connected to the main or important part of
  • noun
  • Computer devices attached to the computer

pivotal

Copy vocabulary

US / ˈpɪvətl /

UK / ˈpɪvətl /

B2
  • adjecitve
  • Having a lot of importance

major

Copy vocabulary

US / 'meɪdʒə(r) /

UK / ˈmedʒɚ /

A2
  • adjecitve
  • Main league; esp. referring to American baseball
  • Important, serious, or large in scope, size
  • noun
  • High-ranking officer in the army
  • Main subject you study at university
  • verb
  • To study a particular subject at university

and

Copy vocabulary

US / ənd /

UK / ənd, ən,ænd /

A1
  • conjunction
  • Used to refer to two or more things
  • Plus; in addition; on top of that
  • Used to introduce an action that follows another

from

Copy vocabulary

US / frəm /

UK / frʌm, frɑm,frəm /

A1
  • preposition
  • Starting at a particular place, time or level

along

Copy vocabulary

US / əˈlɒŋ /

UK / əˈlɔ:ŋ /

A1
  • adverb
  • As a companion; taken with someone
  • preposition
  • At a point on a line
  • Introduction to Video Content
  • Introduction to Differential: How It WorksThe differential is an integral part of all four-wheelers, as it is responsible for allowing the wheels to turn at different RPMs while receiving power from the engine. This mechanism becomes crucial when the vehicle is negotiating a turn, as the wheels on the outer side of the turn need to travel a greater distance and rotate at a higher speed compared to the inner wheels. If the wheels were connected using a solid shaft, they would have to slip to accomplish the turn. This is where the differential comes into play.The ingenious mechanism of a differential enables the left and right wheels to turn at different RPMs while effectively transferring power to both the wheels. In its simplest configuration, power from the engine is transferred to the ring gear through a pinion gear. The ring gear is connected to a spider gear, which is the heart of the differential. The spider gear is capable of two types of rotations: one along with the ring gear and the other on its own axis. It is meshed with two side gears, allowing power to flow from the pinion to both the left and right wheels.In the case of the vehicle moving straight, the spider gear rotates along with the ring gear but does not rotate on its own axis. Thus, it pushes the side gears to turn, and both side gears rotate at the same speed. This assembly of the spider gear and side gears moves as a single solid unit.However, when the vehicle is taking a right turn, the spider gear plays a pivotal role. It rotates on its own axis while still meshed with the ring gear, allowing the outer wheel to rotate at a higher speed and cover the longer distance required for the turn.By understanding the working principle of a differential and its various configurations, we can appreciate its vital role in allowing vehicles to negotiate turns smoothly and safely. The differential is truly an engineering marvel that enhances the performance and maneuverability of four-wheelers.
  • Subtitles section
  • Differential is an integral part of all four wheelers.
  • Wheels receive power from the engine via a drive shaft.
  • The main function of the differential is to allow these wheels to turn at different RPM, while receiving power from the engine.
  • Consider these wheels which are negotiating a turn.
  • differential working animation It is clear that the left wheel has to travel more distance compared to the right wheel.
  • This means the left wheel has to rotate at a higher speed.
  • If these wheels were connected using a solid shaft as shown, the wheels would have to slip to accomplish the turn.
  • This is exactly where a differential comes.
  • The ingenious mechanism in a differential allows left and right wheels to turn at different rpm, while transferring power to both the wheels.
  • We will learn how differential achieves this in a step by step manner, using its simplest configuration.
  • Power from the engine is transferred to the ring gear through a pinion gear.
  • The ring gear is connected to a spider gear, which is at the heart of the differential.
  • Spider gear is free to make 2 kinds of rotations, one along with the ring gear and second on its own axis.
  • Spider gear is meshed with 2 side gears.
  • So, power from the engine flows from the pinion to the left and right wheels as shown.
  • Now let's consider different cases.
  • The vehicle moves straight.
  • In this case spider gear rotates along with the ring gear, but does not rotate on its own axis.
  • Spider gear will push and make the side gears turn, and both will turn at the same speed.
  • Or when the vehicle is moving straight, Spider- Side gear assembly will move as a single solid unit.
  • Now consider the case when the vehicle is taking a right turn.
  • The spider gear plays a pivotal role here.
  • Along with the rotation of the ring gear, it rotates on its own axis.
  • So the spider gear is having a combined rotation.
  • The effect of combined rotation, on the side gear is interesting.
  • When properly meshed side gear has to have same peripheral velocity as that of the spider gear.
  • When the spider gear is spinning as well as rotating, peripheral velocity at the left side of spider gear is sum of spinning and rotational velocity.
  • But at right side it is difference of the two.
  • Or left side gear will have higher speed compared to the right side gear.
  • This is the way the differential manages to turn left and right wheels at different speeds.
  • While taking a left turn, the spider gear will spin in the opposite direction.
  • In order to carry load one more spider gear is usually added.
  • 4 spider gear arrangement is also used for heavy load vehicles.
  • Apart from allowing wheels to rotate at different rpm, differential has got 2 more functions.
  • First is speed reduction at pinion ring gear assembly.
  • This will result in torque multiplication.
  • The other function is to turn the power flow direction by 90 degree.
  • The differential we have gone through so far is known as open or standard differential.
  • It is capable of turning wheels at different rpm, but it has got one major drawback.
  • Consider a situation where one wheel of the vehicle is in a surface with good traction and other wheel on a slippery track.
  • In this case a standard differential will send the majority of the power to the slippery wheel, so the vehicle won't be able to move.
  • To overcome this problem Limited Slip Differentials are introduced.
  • We will learn more about them in a separate video.
  • Thank you