Rotational Motion Question 190

Question: One solid sphere A and another hollow sphere B are of same mass and same outer radii. Their moments of inertia about their diameters are respectively IA and IB such that Here ρA and ρB represent their densities.

Options:

A) IA=IB

B) IA>IB

C) IA<IB

D) IA/IB=ρA=ρB

Show Answer

Answer:

Correct Answer: C

Solution:

[c] In a hollow sphere, the mass is distributed away from the axis of rotation.

So, its moment of inertia is greater than that of a solid sphere.



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