Question

A single wire ACB passes through a smooth ring at C which revolves at a constant speed in the horizontal circle of radius r as shown in the fig. the speed of revolution is

A. `sqrt(rg)`
B. `sqrt(2rg)`
C. `2sqrt(2rg)`
D. `2sqrt(rg)`

Answer 1

Correct Answer - 1
`T cos 60^(@)+T cos 30^(@)=(mv^(2))/R`
`T cos 30^(@)+T cos 60^(@)=mg`
`v=sqrt(rg)`