JEE PYQ: Rotational Motion Question 60
Question 60 - 2019 (10 Jan Shift 1)
To mop-clean a floor, a cleaning machine presses a circular mop of radius R vertically down with a total force F and rotates it with a constant angular speed about its axis. If the force F is distributed uniformly over the mop and if coefficient of friction between the mop and the floor is $\mu$, the torque, applied by the machine on the mop is:
(1) $\mu FR/3$
(2) $\mu FR/6$
(3) $\mu FR/2$
(4) $\frac{2}{3}\mu FR$
BETA
