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What is the change potential energy of a stone of mass 5 Kg that falls from a cliff 10 m high?

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What is the change potential energy of a stone of mass 5 Kg that falls from a cliff 10 m high?

(a) 5 J

(b) 50 J

(c) 500 J

(d) 5000 J

This question was addressed to me during a job interview.

Question is from Potential Energy and Kinetic Energy topic in portion Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering

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The correct option is (c) 500 J

Explanation: PE = 5*10*10 = 500 J.

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