GravitationHard

Question

If a satellite orbits as close to the earth′s surface as possible

Options

A.its speed is maximum
B.time period of its revolution is minimum
C.the total energy of the ′earth plus satellite′ system is minimum
D.the total energy of the ′earth plus satellite′ system is maximum

Solution

For (A) : orbital speed v0 =
For (B) : Time period of revolution T2 ∝ r3
For (C/D) : Total energy = -

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