Beads `A` and `B` each of mass `m` , are connected by a light inextensible cord. They are constrained (restricted) to move on a frictionless ring in a vertical plane as shown. The beads are released from rest at the position shown. The tension in the cord just after the release is.

Options

A. `sqrt(2)mg`
B. `mg`
C. `(mg)/(sqrt2)`
D. `2mg`

Answer

C

Explanation

`Tsin45^(@)=ma(forA)`
`Mg-Tsin45^(@)ma(forB)`
From (i) and (ii), `T=(mg)/(2sin45^(@))=(mg)/(sqrt(2))` .