solid sphere and hollow sphere - moment of inertia

You can release the spheres on an inclined plane. The one that reaches the bottom first will be the solid sphere.

The moment of inertia of the solid sphere is less when compared to the moment of inertia of the hollow sphere because the volume of the solid sphere is less than the hollow sphere.

The solid ball with a smaller moment of inertia will spend less mechanical energy on rotating the ball. Therefore, it will have more kinetic energy to reach the bottom first.

#physics

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