GravitationMedium
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 = -
For (B) : Time period of revolution T2 ∝ r3
For (C/D) : Total energy = -
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