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Physics Question on Gravitation

Two satellites of masses 400 kg, 500 kg are revolving around earth in different circular in defferent circular orbit of radii r1,r2r_1,r_2 such that their kinetic energies are equal. The ratio of r1r_1 to r2r_2 is

A

4:05

B

0.684027778

C

5:04

D

1.052777778

Answer

4:05

Explanation

Solution

KE=GMm2rKE = \frac{GMm}{2r}