Question: 3. A spring is stretched 10 cm by a force of 4 N. A 1 kg mass is attached to the end of the

3. A spring is stretched 10 cm by a force of 4 N. A 1 kg mass is attached to the end of the spring and is given an initial downward displacement of 12 cm. If the mass is also given an initial velocity of 1 m/s, find the function u(t) which governs the motion of the mass.

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