How much gravitational potential energy does a 10 kg mass gain when lifted 17 m? (take g = 10 m/s²)
Answer and explanation
Correct answer: B. 1700 J
- Step 1: ΔPE = mgh. Step 2. ΔPE = 10 × 10 × 17 = 1700 J. Answer: 1700 J. Why not the others: 170 J is what you get if you leave out g. 850 J is what you get if you use ½mgh. 17 J is what you get if you divide by the mass.
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