A planet is revolving around a very massive star in a circular orbit of radius r with a period of revolution T. If the gravitational force of attraction between the planet and the star is proportional to `r^(-n),` then `T^(2)` is proportional to

Options

A. `r^(n+1)`
B. `r^(n+2)`
C. `r^((n+1)//2)`
D. none

Answer

a

Explanation

`T^(2) prop r^(n+1)`