on a frictionless horizontal surface. The spring is compressed 4.0 cm and released from rest.
(a) Determine the maximum speed of the object.
(b) Determine the speed of the object when the spring is compressed 1.5 cm.
(c) Determine the speed of the object as it passes the point 1.5 cm from the equilibrium position.
(d) For what value of x does the speed equal one-half the maximum speed?