A planet is revolving around a star in a circular orbit of radius R with a period T. If the gravitational force between the planet and the star is proportional to R-3/2, then
A. T2 ∝ R5/2
B. T2 ∝ R-7/2
C. T2 ∝ R3/2
D. T2 ∝ R4
Answer:A
A planet is revolving around a star in a circular orbit of radius R with a period T. If the gravitational force between the planet and the star is proportional to R-3/2, then
A. T2 ∝ R5/2 B. T2 ∝ R-7/2 C. T2 ∝ R3/2 D. T2 ∝ R4