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A rigid rod of length l but of negligibl...

A rigid rod of length `l` but of negligible mass has heavy mass `m` attached to one end and is hinged freely at the upper end. It is inverted and then released. What is its speed at the lowest point and what is the tension in the suspension at that instant ? When the same is released from the horizontal position, at what angle from the vertical will the tension in the suspension equal the weight ?
[Hint : Consider conservation of energy and dynamics of circular motion]

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The correct Answer is:
`2 sqrt(gl),5 mg, theta = 71^(@)`
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