A U-shaped smooth wire has a semi-circular bending between A and B as shown in fig. A bead of
Channel: Doubtnut
Date: 2020-07-26

A U-shaped smooth wire has a semi-circular bending between A and B as shown in fig. A bead of mass m moving with uniform speed v through the wire enters the semiculcular bent at A and leaves at B. Find the average force exerted by the bead on the part AB of the wire.