What is the gravitational potential energy of a 5 kg mass held 4 meters above the ground (taking g = 9.8 m/s^2)?
Answer and explanation
Correct answer: B. 196 J
- Step 1: PE = m g h. Step 2. PE = 5 kg 9.8 m/s^2 4 m = 196 J. Answer: 196 J. Why not the others: 20 J multiplies m * h without g.
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