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A composite rod of mass 2m and length 2l...

A composite rod of mass `2m` and length `2l` comprises two indentica rods joined end to end at `P`. The composite rod hinged at one of its ends is kept horizontal as shown in the figure. If it is realeased from rest.

a. find its angular speed when it becomes vertical.
b. If the lower rod gets detached with the upper rod due to centrifugal effect at their joint `P`, at the vertical position of the composite rod, find their linear and angular velocities just after their separation.

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