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

Answer

A, B, C

Explanation

For (A) : orbital speed `v_(0)=sqrt((GM)/r), r_("min")=R` so `v_(0)=` maximum
for (B) : Time period of revolution `T^(2) prop r^(3)`
For (C/D) : Total energy `= - (GMm)/(2r)`