Is the plot consistent with the mathematical equation for the elastic potential energy of a spring? Briefly explain. 2. What is the direction and magnitude of the force applied by the spring on the block when the block is at the following positions: a. x, b. 0 (the equilibrium position of the spring) c. -x. Explain your reasoning. 3. Determine the sign of the slope of the potential energy curve at x, -x, and 0. At each point, how does the sign of the slope compare to the sign of the force exerted by the spring? Potential Energy Curves