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A particle that is attached to a vertical spring is pulled down a distance of 4.0cm...

A particle that is attached to a vertical spring is pulled down a distance of 4.0cm below its equilibrium position and is released from rest. The initial upward acceleration of the particle is 0.30 m/s2. a) What is the period of the ensuing oscillations? b) With what velocity does the particle pass through its equilibrium position? c) What is the equation of motion for the particle (choose upward direction to be positive).

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