Assertion The total kinetic energy of a rolling solid sphere is the sum of translational and rotationla kinetic energies .
Reason For all solid bodies. Totla kinetic energy is always twice of translational kinetic energy.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.

Answer

C

Explanation

`K_(N)= K_(R) + K_(T)`
This equation is correct for any body which is rolling without slipping. For the ring and hollow cylinder only `K_(R)= K_(T)`
i.e., `K_(N)= 2K_(T)`