Question

What is meant by gravitational potential energy? Derive an expression for it for a body placed at a height above the ground.

Answer 1

Answer:

Gravitational potential energy is energy an object possesses because of its position in a gravitational field. ... Since the force required to lift it is equal to its weight, it follows that the gravitational potential energy is equal to its weight times the height to which it is lifted. PE = kg x 9.8 m/s2 x m = joules

PLS MARK AS BRAINALIST

Answer 2

Answer:

Expression for Gravitational Potential Energy at Height (h) – Derive ΔU = mgh. If a body is taken from the surface of the earth to a point at a height 'h' above the surface of the earth, then ri = R and rf = R + h then, ΔU = GMm [1/R – 1/(R+h)]