Question

If each point mass of a rigid ring covers a distance of $\frac{\pi }{2}m,$ by how much angle (in radians) the ring has been rotated? (R = 2m)

• A. $\frac{\pi }{2}radians$
• B. $\frac{\pi }{4}radians$
• C. $\pi$ radians
• D. $\frac{3\pi }{4}radians$

Answer 1

The correct option is B $\frac{\pi }{4}radians$

As discussed by Avinash in the previous videoclip,
$s=R\theta$
$\Rightarrow \theta =\frac{s}{R}$
$\theta =\frac{\pi }{4}radians.$