Question: A block A resting on a smooth horizontal plane is attached by threads to a point P and, by a weightless pulley, to a block

A block A resting on a smooth horizontal plane is attached by threads to a point P and, by a weightless
pulley, to a block B of the same mass, m. A is also attached to a point O by a spring of length l0 and spring constant
k =5mg/l0. The thread PA is cut and block A starts moving.
1. Find the distance at which block A breaks off the plane.
2. Find its velocity at the moment it is breaking off the plane.

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