A bead of mass 'm' is attached to one en...

A bead of mass 'm' is attached to one end of a spring of natural length R & spring constant `k = ((sqrt3 + 1))/(R)`. The other end of the spring is fixed at point A on a smooth vertical ring of radius R as shown. The normal reaction at B just after it is released to move is

`sqrt(3) mg`

`3 sqrt(3) mg`

`(mg)/2`

`(3 sqrt(3) mg)/2`

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