A-LevelPhysicsWork, energy and power9702/12 · Oct/Nov 2020 · Q181 Mark
The change in gravitational potential energy ∆E of an object of mass m when moving through height ∆h near the surface of the Earth is given by the equation shown. ∆E = mg∆h Which equation is needed as part of the derivation of this expression?
Akinetic energy = 1/2 × mass × (speed)²
Bmoment = force × distance
Cweight = mass × acceleration of free fall
Dwork done = power × time
✓ Correct answer
C: weight = mass × acceleration of free fall
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