Answer the following questions related to gravitational potential energy.
PHYSICS · Multi-part · GCSE · Physics · Energy · Energy
Problem
Answer the following questions related to gravitational potential energy.
(i) Define (a) potential energy and (b) gravitational potential energy.
(ii) Explain why gravitational potential energy is said to be relative and depends on the choice of the zero-level of potential energy.
(iii) A stone rests on the edge of a rooftop. One student chooses the roof as the zero level of potential energy while another chooses the ground. Will the two students obtain the same numerical value for the stone’s gravitational potential energy? Give reasons for your answer.