1.

What is the total energy possessed by a satellite of mass “m” orbiting above the earth of mass “M” and radius “R” at a height “h”?(a) [(G*M*m)/2*(R+h)](b) -[(G*M*m)/2*(R+h)](c) [(G*M*m)/(R+h)](d) -[(G*M*m)/(R+h)]I got this question in an interview.I need to ask this question from Gravitation in section Gravitation of Physics – Class 11

Answer»

The correct choice is (b) -[(G*M*m)/2*(R+h)]

BEST explanation: TOTAL ENERGY (E) of a satellite is the sum of its potential energy (PE) and kinetic energy (KE).

PE = – (G x M x m)/(R+h)

KE = (G x M x m)/(2 x (R+h))

E = PE + KE

 = -(G x M x m)/(R+h) + (G x M x m)/(2 x (R+h))

 = -(G x M x m)/(2 x (R+h)).


Discussion

No Comment Found

Related InterviewSolutions