Required information

A $4\mathrm{.}000-$ lb block is supported as shown by a spring of constant $k=2l\frac{b}{i}n.$ that can act in tension or compression. The block is in its equilibrium position when it is struck from below by a hammer that imparts to the block an upward velocity of $90in\frac{.}{s}.$

Determine the corresponding velocity and acceleration of the block.

The corresponding velocity of the block is $f\frac{t}{s}.($Round the final answer to three decimal places.$)$

The corresponding acceleration of the block $-0\mathrm{.}87649f\frac{t}{s^2}.($Include a minus sign if necessary$-)$