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Find the gravitational potential energy of 2.5 kg mass kept at a height of 15 m above the ground. The force of gravity on mass 1 kg is 10 n.

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Mass m = 2.5 kg

Gravitational potential energy is the work done against force of gravity is stored in the body at a height h.

P.E = U = mgh

U = 2.5 × 10 × 15

U = 25/10 × 10 × 15 = 375 j

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