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 the two spheres are smooth.
BETA
