A body of mass 'm' is moving slowly up the rough hill from point A to point B as shown in figure by a force which is acting tangential to surface at each point on the hill. Work done by this force is :

Question

G1 Physics · Accepted Answer

For slow motion, applied work equals the increase in gravitational potential plus work against friction. The gravitational part depends only on height, and ∫µmg cosθ ds=µmgΔx, so the result is independent of the detailed path but depends on µ and m. Hence A,C,D.