Given, weight of body, W=64N Coefficient of static friction, µs=0.8 Coefficient of dynamic friction, µd=0.6 Force required to move the body from rest = Coefficient of static friction × Weight of the body =µs×mg =0.8×64 ...(i) Force required to overcome dynamic friction = Coefficient of dynamic friction × Weight of thebody =µd×mg =0.6×64 ...(Ii) As weight, W=64N ∴ Mass of the body, m=
64
g
As we know, F=ma From Eqs. (i) and (ii), we get F=mg(µs−µd) ma=64(0.8−0.6) ⇒