A small bar A resting on a smooth horizontal plane is attached by threads to a point P(figure) and,
Channel: Doubtnut
Date: 2020-08-23

A small bar A resting on a smooth horizontal plane is attached by threads to a point P(figure) and, by means of a weightless pulley, to a weight B possessing the same mass as the bar itself Besides, the bar is also attached to a point O by means of a light non-deformed spring of length `l_0=50cm` and stiffness `x=5mg//l_0`, where m is the mass of the bar. The thread PA having been burned, the bar starts moving. Find its velocity at the moment when it is breaking off the plane.