Question

A 25 kg mass or a 30 kg mass at the top of a hill?
A car at the top of the hill or the bottom of a hill?
A plane on the ground or a plane in the air?
A full plane or an empty plane (both are flying)?
Circle the one with more Potential Energy

Answer 1

Answers (circle these — brief reason given):

1) A 25 kg mass or a 30 kg mass at the top of a hill? — Circle: 30 kg.
Reason: U = mgh, larger mass → larger U (same height).

2) A car at the top of the hill or the bottom of a hill? — Circle: top of the hill.
Reason: greater height → larger U.

3) A plane on the ground or a plane in the air? — Circle: plane in the air.
Reason: higher altitude → larger U.

4) A full plane or an empty plane (both are flying)? — Circle: full plane.
Reason: more mass → larger U at the same height.

(Assumes gravitational potential energy U = mgh and same reference level for each pair.)