Question

an object of mass 15 kg moving at velocity 10 m/s is brought to rest by applying brakes calculate the work done by brakes​

Answer 1

A body of mass 15 kg moving with a velocity of 10 ms

−1

is bought to rest. The work done by the brake is

Hard

Answer

W=change in kinetic energy=

2

1

m(v

2

−u

2

)

W=

2

1

×15×(0

2

−10

2

)

W=−750J