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Potential and Kinetic energy of an oscillator

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A block of mass m = 0.65 kg is fastened to a spring with k = 65 N/m. The block is pulled a distance x = 11 cm from its equilibrium position at x = 0 on a frictionless surface and released from rest at t = 0. v= 1.1 m/s^2

Calculate the potential and kinetic energy of the oscillator when the block is at x = 0.4 A

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In this case, A = 11cm = 0.11m since block does not have initial velocity since it is released from ...

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