A light planet is revolving around a massive star in a circular orbit of radius $R$ with a
period of revolution $T$ . If the force of attraction between planet and star is proportional to $R^{- 3/2}$ then choose the correct option:

Question

A light planet is revolving around a massive star in a circular orbit of radius

R

with a
period of revolution

T

. If the force of attraction between planet and star is proportional to

R^{- 3/2}

then choose the correct option:

Accepted Answer

Correct answer: A. (a) F= GMmR^3/2=m ^2R ^2 ∝ 1R^5/2 ∵T= 2 T^2 ∝R^5/2

$A light planet is revolving around a massive star in a circular orbit of radius R with a period of revolution T . If the force of attraction between planet and star is proportional to R^{- 3/2} then choose the correct option:$