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A square frame, made of 4 equal rods of ...

A square frame, made of `4` equal rods of length `l`, mass `m` each is hinged at corner `A` so that it can rotate about a horizontal axis paralle to line `DB` as shown. It is slightly disturbed and it starts falling about hinge axis. Calculate following parameters when the frame is completely inverted and point `C` reached the lower point of its motion.

Velocity of point `B` :

A

`sqrt((3)/(sqrt(2))gl)`

B

`sqrt(3 sqrt(2) gl)`

C

`sqrt(3 (g)/(l))`

D

`sqrt(6 (g)/(l))`

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The correct Answer is:
A
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