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A block is hung from a vertical spring. The sprint stretches (h = 0.0650 m) as shown for a particular instant in time in Figure. Consider the Earth, spring, and block to be in the system. If m = 0.865 kg and k = 125 N/m, find the change in the system's potential energy between the two times depicted in the figure.

1444_A block is hung from a vertical spring.png

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