Assertion One end of a massless rod of length l is hinged so that it is free to rotate in vertical

Assertion One end of a massless rod of length l is hinged so that it is free to rotate in vertical

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.