A body of mass 40kg resting on a rough horizontal surface is subjected to a force P which is just enough to start the motion of the body. If `mu_s = 0.5, mu_k =0.4, g = 10ms^(-2)` and the force P is continuously applied on the body, then the acceleration of the body is

Answer

1

Explanation

`P =mu_kmg` (at rest), When the body starts moving, `P- f_k = ma`
`mu_smg - μ_kmg= marArr a= 1ms^(-2)`