Question

A solid sphere and a hallow sphere of same mass of radius rotate about their diameter with the same K.E. If torques of equal magnitude are applied on their, the ratio of their angular displacement before they are brought to rest is

• A. $1:1$
• B. $3:5$
• C. $5:3$
• D. $2:3$

Answer 1

The correct option is A $1:1$

Let $r$ and $R$ be the radii of hollow sphere

$\therefore Ratio=\frac{1}{1}=1:1$

Hence, the option $\left(A\right)$ is correct.