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v Partc v Recall that in the equilibrium position, the upward force of the spring balances the force of gravity on the weight. Use this concept, along with the variable mass value, the ruler, and the moveable line, to estimate the spring constant k of the spring. Set the damping to "Lots" so that the mass will come to rest quickly after being changed, and make sure the gravity is set to "Earth." Finally, set the spring constant to "Small." Estimate the spring constant several times (using different values of mass) and average together for the most accurate calculation. Express your answer in N/m to two significant figures. View Available Hint(s) | k= 3.0 N/m (Submit) Previous Answers vY Correct For parts D-F, you'll investigate the energetics of the spring. Select the Energy Simulation. vy PartD You should see an Energy Graph to the left. If not, make sure you are in the correct simulation. Set the Gravity to "None" (g = 0), which simulates what happens without any gravitational forces (and consequently removes gravitational potential energy from the energetics). Adjust the damping slider to "None" (this prevents any energy dissipation). Place the weight on the spring and set its mass value to 125 g. Set the spring constant to "Large." Next, stretch the spring and release the mass. The amplitude of the stretch should be large enough to get good resoluton on the Energy Graph, but not soo much that the spring overshoots at the top. Observe how the kinetic energy and elastic potential energy vary with time. Note: you can slow down or stop time using the controls in the lower right of the simulation window. When is the elastic potential energy of the spring a maximum? When the spring isn't stretched or compressed When the spring is most compressed When the spring is most stretched Both when the spring is most compressed and when the spring is most stretched Request