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

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

A

330J

B

150J

C

100J

D

50J

Text Solution

Verified by Experts

The correct Answer is:
B
K.E= Total work done on the body- work done against friction `=Fs- mu mg s= 25 xx 10-0.2 xx 5 xx 10 xx 10= 150J`
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Energy of a body is defined as its capacity of doing work. A body of mass 5 kg initially at rest is subjected to a horizontal force of 20N . What is the kinetic energy acquired by the body at the end of 10 s ?