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 $I_A$ and $I_B$ such that Here $\rho_A$ and $\rho_B$ represent their densities.
Options:
A) $ I_A=I_B $
B) $ I_A>I_B $
C) $ I_A<I_B $
D) $ I_A/I_B = {\rho_A}={\rho_B} $
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.
