UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy Eo. Its potential energy is:
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E0
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2E0
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1.5 E0
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-E0
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Explanation:
Detailed explanation-1: -Kinetic energy of the satellite is 40.02 × 109 J, potential energy is-80.04 × 109 J, total energy is-40.02 × 109 J and binding energy is 40.02 × 109 J. [Note: Total energy of orbiting satellite is negative.]
Detailed explanation-2: -The ratio of kinetic energy and the potential energy of the satellite rotating around the earth is: 1 : 2.
Detailed explanation-3: -E=K+U=GmME2r−GmMEr=−GmME2r. We can see that the total energy is negative, with the same magnitude as the kinetic energy. For circular orbits, the magnitude of the kinetic energy is exactly one-half the magnitude of the potential energy.
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