Two bodies of masses 8 kg and 4 kg are moving in concentric circular orbits of radii `r_(1) and r_(2) ` respectively . If their time periods are same , the ration of their centripetal accelerations is

Options

A. `r_(1):r_(2)`
B. `2r_(1):r_(2)`
C. `r_(1):2r_(2)`
D. `r_(1): r_(2)`

Answer

A

Explanation

`a_(1):a_(2)=r_(1)omega_(1)^(2):r_(2)omega_(2)^(2)=r_(1):r_(2)" " (therefore omega _(1): omega_(2))`