In the previous question the smallest kinetic energy at the bottom of the incline will be achieved by

Options

A. the solid sphere
B. the hollow sphere
C. the disc
D. all will achieve same kinetic energy

Answer

B

Explanation

For all the bodies, torque is same.
Hence, angular momentum of inertia implies lesser
kinetic energy
Among all, the hollow sphere has the maximum moment of inertia `I=(2/3 MR^(2))`