Figure 1. Natural Length of Vertical Spring Figure 2. Equilibrium Position of Block-Spring System Figure 3. Release Position of Block-Spring System
displacement from equilibrium. The experiment is assumed to be performed near Earth's surface. What is the magnitude of the change in potential energy of the block-spring system when it travels from its lowest vertical position to its highest vertical position? A Zero B $2 M g L_{1}$ C $2 k_{0} L_{1} L_{2}$ D $\frac{1}{2} k_{0}\left(L_{1}+L_{2}\right)^{2}$Help with this much appreciated!

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