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a 85.5 kg block oscillates on the end of an ideal spring( spring constant 105 N/m)...

a 85.5 kg block oscillates on the end of an ideal spring( spring constant 105 N/m) with simple harmonic motion of amplitude A=4.75 cm. Assume there is no friction anywhere. During this motion: when the spring is stretched distance 0.327A from equilibrium: Find the fraction of its total energy that is kinetic energy.

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