A ball has 116.62 J of gravitational potential energy at a height of 85 m. What is the mass of the ball?

Gravitational potential energy is calculated with PE = mgh. Rearrange to find the mass: m = PE/(gh) = 116.62/(9.8 × 85) ≈ 0.14 kg. So the ball’s mass is 0.14 kg, choice A.

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