JEE PYQ: Rotational Motion Question 35
Question 35 - 2020 (07 Jan Shift 1)
As shown in the figure, a bob of mass $m$ is tied by a massless string whose other end portion is wound on a fly wheel (disc) of radius $r$ and mass $m$. When released from rest the bob starts falling vertically. When it has covered a distance of $h$, the angular speed of the wheel will be:
(1) $\frac{1}{r}\sqrt{\frac{4gh}{3}}$
(2) $r\sqrt{\frac{3}{2gh}}$
(3) $\frac{1}{r}\sqrt{\frac{2gh}{3}}$
(4) $r\sqrt{\frac{3}{4gh}}$
BETA
