A metre stick is is held verticaly with one end on a rough horizontal floor. It is gently alowed to fal on the floor. Assuming that the end ast the floor does not slip find the angular speed of the rod when it hits the floor.

Answer

A, D

Explanation

Let the mass of rod Therefore applying laws of conservastion of energy
`1/2Iomega^2=mgl/2`
`rarr 1/2xxml^2/3xxomega^2=mgl/2`
`rarr omega^2=(3g)/2`
`rarr omega=(sqrt(3g)/l)`
`=sqrt(3xx9.8/1)`
`=5.42rad/s`