A 75-lb block is supported by the spring arrangement shown. The block is moved vertically...

A 75-lb block is supported by the spring arrangement shown. The block is moved vertically downward from its equilibrium position and released. Knowing that the amplitude of the resulting motion is 2 in., determine (a) the period and frequency of the motion, (b) the maximum velocity and maximum acceleration of the block.

Fig. P19.18