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The decrease in potential energy of a ball of mass 20kg, which falls from a height of 50cm, is?

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The decrease in potential energy of a ball of mass 20kg, which falls from a height of 50cm, is?

(a) 968J

(b) 98J

(c) 1980J

(d) 450J

This question was posed to me during an online exam.

The above asked question is from Energy in portion Kinematics of Engineering Physics I

1 Answer

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Best answer
Right answer is (b) 98J

Explanation: U = mgh

U = 20×9.8×0.50 = 98J.

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