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A body of mass 5 kg rests on a rough hor...

A body of mass 5 kg rests on a rough horizontal surface of coefficient of friction 0.2. The body is pulled through a distance of 10 m by a horizontal force of 25 N . The kinetic energy acquired by it is `(g=10ms^(2))`

A

200J

B

150J

C

100J

D

50J

Text Solution

Verified by Experts

The correct Answer is:
B
K.E of the vehicle
=Work done against the force of friction
If s is the stopping distance, then
`1/2mv^2=fxxs=mumgxxs`
`:." "s=(1mv^2)/(2mumg)" ":." "s=(1m^2v^2)/(2mumg(m))=(1p^2)/(2mu^2g)`
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