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A 2 kg body rises 5 m. Work done by gravity? (g = 10 m/s^2)
A+10 J
B-10 J
C-100 J
D+100 J
Answer & Solution
Correct answer: C. -100 J
Gravity opposes upward motion, so W = -mgh = -2 x 10 x 5 = -100 J.
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