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A mass of 3 kg stretches a spring 61.25 cm. Supposing that there is no damping...

A mass of 3 kg stretches a spring 61.25 cm. Supposing that there is no damping and that the mass is set in motion from 0.5 m above its equilibrium position with a downward velocity of 2 m/s, determine the position of the mass at any time. Find the amplitude, the frequency, the period and the phase shift of the motion.

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