A 20-lb block is attached to spring A and connected to spring B by a cord and pulley. The block is held in the position shown with both springs un-stretched when the support is removed and the block is released with no initial velocity. Neglecting friction and the masses of the pulley and the springs, determine

(a) The period of the resulting vibration,

(b) The maximum velocity achieved by the block.

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PA k=12 livin 20 lb A k= 12 livin