Question

work done in lifting a body from the surface of the earth to a height h against the gravitational force is (h = R)​

Answer 1

hey mate,

When a body is raised to a height h,it moves opposite to the direction of gravitational force on it.Therefore,

(a)Work done by applied force is positive since the body moves in the direction of applied force.

(b)Work done by gravitational force is negative.

hope this would help you!!