Question

A solid sphere and a hollow sphere of the same material and of a same size can be distinguished without weighing

• A. by determining their moments of inertia about their coaxial axes
• B. by rolling them simultaneously on an inclined plane
• C. by rotating them about a common axis of rotation
• D. by applying equal torque on them

Answer 1

The correct option is B by rolling them simultaneously on an inclined plane

The velocity of a rolling body is inversely proportional to the moment of inertia.

Since the moment of inertia for a hollow sphere is more than that of a solid sphere, the solid sphere rolls down faster than a hollow sphere.

Hence, Option B is correct