A frictionless spring with a 8-kg mass can be held stretched 2 meters beyond its natural length by a force of 40 newtons. If the spring begins at its equilibrium position, but a push gives it an initial velocity of 1.5 m/sec, find the position of the mass after t seconds.

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I have answered the same question in Maths. I tried to copy my answer here. But I thought sharing the link.

http://www.enotes.com/math/q-and-a/frictionless-spring-with-8-kg-mass-can-held-333866

 

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