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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 9 - Rotational Dynamics > Two circular discs A and B are of equal masses and thickness but made of metal with densities dA​ and dB​ (dA​>dB​). If their moments of inertia about an axis passing through their centres and perpendicular to circular faces are IA​ and IB​, then

Two circular discs A and B are of equal masses and thickness but made of metal with densities dA​ and dB​ (dA​>dB​). If their moments of inertia about an axis passing through their centres and perpendicular to circular faces are IA​ and IB​, then

A mass m1 moves with a great velocity. It strikes another mass m2 at rest in head on collision. It comes back along its path with low speed after collision. Then