Question

A satellite of mass 'm' is revolving in an orbit of
radius 'R around a planet of mass M. It lost some
energy against the work in air resistance and shifts
to an orbit of radius
. The lost energy is
GmM
GmM
(1) ZR
(2)
R
GmM
2GmM
(3) AR
R​

Answer 1

Answer:

We need a centripetal force F = mv2/r to keep the planet in orbit: F = GmM/r2. ... the star is finite, it moves a bit too around the center of mass: v∗m∗ = vpmp, ...