Posted by **Marwan** on Tuesday, April 24, 2012 at 6:59am.

A spring with a mass of 4 kg has damping constant 28, and a force of 12 N is required to keep the spring stretched 0.5 m beyond its natural length. The spring is stretched 1 m beyond its natural length and then released with zero velocity. Find the position of the mass at any time t and mass that would produce critical damping

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