A ring of mass 0.8 kg and radius 1m is hinged at a point on its periphery such that the hinge is at the same horizontal level as its centre. The ring in vertical plane and released. Find the force exerted (in N) by the hinge on the ring just after the release.

Answer

4

Explanation

`mgR=2mR 2alpha`
`alpha=g/(2R)`
`a_(C)=g/2`
`mg-(mg)/2=N`
`N=(mg)/2 =4`