Two bodies of equal masses revolve in circular orbits of radii ${R_1}$ and ${R_2}$ with the same period. Their centripetal forces are in the ratio
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(b) $F = m\left( {\frac{{4{\pi ^2}}}{{{T^2}}}} \right)R$. If masses and time periods are same then $F \propto R$
$\therefore {F_1}/{F_2} = {R_1}/{R_2}$
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