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

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

A) 968 J

B) 98 J

C) 1980 J

D) None of these

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Best answer

B) 98 J

Explanations:

\(\Delta U = mgh\)

\(20 \times 9.8 \times0.5 = 98 J\)

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