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An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy E0. Its potential energy is(a) –E0 (b) 15E0 (c) 2E0 (d) E0 |
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Answer» Correct Option (c) 2E0 Explanation : For a satellite, we have Kinetic energy = GmM/2r Potential energy = -GmM/r Total energy E0 = KE + PE = GmMr/2r - GmM/r = GmM/2r = PE/2 or PE = 2E0 |
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