A 20-lb block is initially held so that the vertical spring attached as shown is un-deformed. Knowing that the block is suddenly released from rest, determine (a) The amplitude and frequency of the...

1 answer below »

A 20-lb block is initially held so that the vertical spring attached as shown is un-deformed. Knowing that the block is suddenly released from rest, determine
(a) The amplitude and frequency of the resulting motion,
(b) The maximum velocity and maximum acceleration of theblock.