Question

A body of mass 03 kg is taken up an inclined plane



of length 10 m and height 5 m, and then allowed



to slide down to the bottom again. the coefficient



of friction between the body and the plane is 0-15.



what is the



(a) work done by the gravitational force over the



round trip?



(b) work done by the applied force on the upward



journey



(c) work done by the frictional force over the round



trip,



(d) kinetic energy of the body at the end of the



trip

Answer 1

work done by gravitational force is mgh
which is 3×10×5 = 150 J