question_answer

Two satellites, A and B, have masses m and 2 m respectively. A is in a circular orbit of radius R, and B is in a circular orbit of radius 2R around the earth. The ratio of their kinetic energies, \[\frac{{{T}_{A}}}{{{T}_{B}}},\]is-          [JEE Main 12-Jan-2019 Evening]

A)  1        

B)  2      C)  \[\sqrt{\frac{1}{2}}\]                 D)      \[\frac{1}{2}\] Correct Answer: A Solution : [a] The velocity of the satellite is