A smooth semicircular tube AB of radius r is fixed in a vertical plane and contains a heavy flexible chain of length π r and weight Wπ r as shown. Assuming a slight disturbance to start the chain in motion, the velocity v with which it will emerge from the open end B of the tube is

Engineering

Physics

Center of Mass

Question

$\frac{4 gr}{π}$

$\frac{2 gr}{π}$

$\sqrt{2 gr (\frac{2}{π} + π)}$

$\sqrt{2 gr (\frac{2}{π} + \frac{π}{2})}$

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