Physics (AS & A Level) · Oct / Nov 2025 · Paper 14 · Question 19

An object travels between two points. The change in gravitational potential energy \Delta E_p of the object is given by \Delta E_p = mg\Delta h where m is the mass of the object, \Delta h is its change in height and g is the acceleration of free fall. What is a necessary condition in order for the above equation to be valid?

1. AThe object must have a constant acceleration of 9.81 m s^{-2}.
2. BThe object must be travelling in a uniform gravitational field.
3. CThe object must be travelling only in a vertical direction.
4. DThe resultant force on the object must be equal to its weight.

As printed in the paper