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A rod of length l is in motion such that...

A rod of length l is in motion such that its ends A and B are moving along x-axis and y-axis respectively. It is given that `(d theta)/(dt) = 2` rad/sec always . P is a fixed point on the rod . Let M be the projection of P on x-axis . For the time interval in which `theta` changes from 0 to `(pi)/(2)` , the correct statement is

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