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15 Jul 2011 16:59:19 IST

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If g is the acceleration due to gravity on the earth's surface;the gain in potential energy of an ob

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If g is the acceleration due to gravity on the earth's surface;the gain in potential energy of an objrct of mass m raised from the surface of the earth to a height equal to tha radius r of the earth is-

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D Bansod

New kid on the Block

Joined: 10 Jan 2011

Posts: 3

15 Jul 2011 17:44:16 IST

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PE = -GMm/r ( wer "r" is the distance frm center of earth) therefore intially its PE₁ = GMm/R (wer "R" is the radius of earth) and finally its PE2 = -GMm/2R therefore Gain in PE = PE1 - PE2 = GMm/2R bt we knw that g = GM/R² therefore gain in PE = gR/2......

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