Question

In case of pure rolling, what will be the velocity of point $A$ of the ring of radius $R$ ?

• A. $v_{cm}$
• B. $\sqrt{2}{v}_{cm}$
• C. $\frac{v_{\text{cm }}}{2}$
• D. $2v_{cm}$

Answer 1

Answer: (B)

$v_{net}=\sqrt{v_{cm}^2+v_{cm}^2}$
$=v_{cm}\sqrt{2}$