physics

A 0.46 kg object connected to a light spring with a spring constant of 18.0 N/m oscillates on a frictionless horizontal surface. The spring is compressed 4.0 cm and released from rest.
(a) Determine the maximum speed of the mass.
unit = cm/s
(b) Determine the speed of the mass when the spring is compressed 1.5 cm.
unit = cm/s
(c) Determine the speed of the mass when the spring is stretched 1.5 cm.
unit = cm/s
(d) For what value of x does the speed equal one-half the maximum speed?
unit = cm

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