070321

Question : What is the minimum energy required to launch a satellite of mass m from the surface of a planet of mass M and radius R in a circular orbit at an altitude of 2R?
a) 5GMm/6R
b) 2GMm/3R
c) GMm/2R
d) GMm/3R

Doubt by Vaibhav

Ans : a) 5GMm/6R.

Solution : 
Detailed Explanation is coming soon.