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An undamped 1.55 kg horizontal spring oscillator has a spring constant of 32.6 N/m. While oscillating,...

An undamped 1.55 kg horizontal spring oscillator has a spring constant of 32.6 N/m. While oscillating, it is found to have a speed of 2.31 m/s as it passes through its equilibrium position. What is its amplitude ? of oscillation?

What is the oscillator's total mechanical energy ?tot as it passes through a position that is 0.615 of the amplitude away from the equilibrium position?

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