# Two solid spheres A and B each of radius R are made of materials of densities ρA and ρB respectively….

Q: Two solid spheres A and B each of radius R are made of materials of densities ρA and ρB respectively. Their moments of inertia about a diameter are IA and IB respectively. The value of IA / IB is

Sol: $\large \frac{I_A}{I_B} = \frac{\frac{4}{3}\pi R^3 \rho_A}{\frac{4}{3}\pi R^3 \rho_B}$

$\large \frac{I_A}{I_B} = \frac{\rho_A}{\rho_B}$