Rotational Motion Question 147

Question: A hollow smooth uniform sphere A of mass m rolls without sliding on a smooth horizontal surface. It collides head on elastically with another stationary smooth solid sphere B of the same mass m and same radius. The ratio of kinetic energy of B to that of A just after the collision is

Options:

A) 1 : 1

B) 2 : 3

C) 3 : 2

D) None of these

Show Answer

Answer:

Correct Answer: C

Solution:

[c] After collision velocity of COM of A becomes zero and that of B becomes equal to initial velocity of COM of A.

But angular velocity of A remains unchanged as me two spheres are smooth.



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