Three massless rods are fixed to form a ...

Three massless rods are fixed to form a right angled triangular frame such that AB=BC=1 . Two identical small objects of mass m are fixed at A and C . The frame is hinged about B such that the frame can rotate in vertical plane about an horizontal axis without friction. Initially AB is vertical and BC is horizontal and the system is released from rest.

Tension in the rod AC when it (rod AC) becomes horizontal is

`sqrt(2)`mg

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

`(ssqrt(2)-1)` mg

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