Assertion One end of a massless rod of length l is hinged so that it is free to rotate in vertical
Channel: Doubtnut
Date: 30/08/2020

Assertion One end of a massless rod of length l is hinged so that it is free to rotate in vertical plane about a horizontal axis. If a particle is attached to the other end of the rod, then the minimum speed at lower most position of  the particle is `sqrt(5gl)` to complete the circular motion.  Reason Work done by cnetripetal force on the particle is always zero.