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An inextensible string AB is tied to a b...

An inextensible string AB is tied to a block B of negligible dimensions and passes over a small pulley C so that free end A hangs h unit above the ground on which the block B rests. In this initial position shown in fig. The free end A is h unit below C. if now end A moves horizontally with a velocity `v_(0)`, obtain an expression for the velocity of the block at any time t.

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