Question

Of the two eggs which have identical sizes, shapes and weights, one is raw and the other is half boiled. The ratio between the moment of inertia of the raw to the half boiled egg about central axis is

• A. One
• B. Greater than one
• C. Less than one
• D. Not comparable

Answer 1

The correct option is B Greater than one

Boiled egg is rigid and thus act like a rigid body while rotating but raw egg contains liquid inside it. Hence when it rotates, the liquid moves away from the central axis due to centrifugal force and thus increasing its moment of inertia.

That's why $I_{raw}>I_{boiled}$