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A car of mass 1000kg moves from point A...

A car of mass `1000kg` moves from point `A` to `B`. If kinetic energy of car at point `A` is `100KJ` and at `B` is `220 Kj`. Then find work done by friction force on the car ?

A

`-100kJ`

B

`100kJ`

C

`-20kJ`

D

`20 kJ`

Text Solution

Verified by Experts

The correct Answer is:
D
By using work energy theorm,`W=DeltaKE`
`rArrW_(gravity)+W_(f riction)=DeltaKE`
`rArrmgh+W_(f riction)=120xx10^(3)rArrW_(f riction)=20kJ`
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