Question

A satellite is moving with a constant speed v in a circular orbit about the earth. An object of mass m is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At the time of its ejection, the kinetic energy of the object is

(a) (1/2) mv²

(b) mv² 

(c) (1/3)mv² 

(d) (2/3) mv² 

Answer 1

Correct option (b) mv² 

Explanation :

Escape speed.

Kinetic energy of the object at the time of ejection