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Question: A body of mass 40 kg resting on a rough horizontal surface is subjected to a force P which is just e...

A body of mass 40 kg resting on a rough horizontal surface is subjected to a force P which is just enough to start the motion of body. If µs = 0.5, µk = 0.4, g = 10 m/s2 and the force P is continuously applied on the body, then the acceleration of the body is –

A

Zero

B

1 m/s2

C

2 m/s2

D

2.4 m/s2

Answer

1 m/s2

Explanation

Solution

p = µsmg = 0.5 × 40 × 10 = 200 N

a = p−fkm\frac { p - f _ { k } } { m }