Physics
Write an expression for the potential energy of a body of mass m placed at a height h above the earth’s surface. State the assumptions made, if any.
Work, Energy & Power
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Answer
The work done in lifting a body to a height h is
W = force of gravity (mg) × displacement (h) = mgh
Therefore, this work is stored in the body in the form of its gravitational potential energy.
Hence, Gravitational potential energy U = mgh
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