ch15-p030 - 30. The total mechanical energy is equal to the...

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30. The total mechanical energy is equal to the (maximum) kinetic energy as it passes through the equilibrium position ( x = 0): 1 2 mv 2 = 1 2 (2.0 kg)(0.85 m/s) 2 = 0.72 J. Looking at the graph in the problem, we see that U ( x =10)=0.5 J. Since the potential
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