UNIT 4 Work and Energy 4.H Potential Energy and Choice of Zero NAME DATE Scenario An ideal spring of an unstretched length of lo= 0.25 m and spring constant k = 50 N/m is hung vertically above a level floor as shown in the figure. A 1.0 kg block is attached to the spring when it is at its natural length, released and allowed to move freely. 0.25m 1.0m Using Representations PART A: Draw and label the forces exerted on each block in the diagram. Qualitatively consider relative magnitudes of the forces. The equilibrium point of the block-spring system is shown as a dotted line. 1. Oko PART B: Quantitative Analysis i, Calculate how much the spring has stretched when the block is at equilibrium. ii. Calculate the height of the equilibrium position of the spring, with respect to the floor. PART C: Angela is tasked with completing energy bar charts for the scenario described above and creates the chart (below and left) for the time just as the block is released. Complete the energy bar chart below and right that would depict the energy of the block-Earth-spring system as the block passes through equilibrium. When just released K Ug Us When passing through equlibrium K U, US 7.52 Block/Earth/Spring system when Ug = 0 at the ground 4.H Potential Energy and Choice of Zero Dominique says that the height above the ground doesn't matter, only the change in height is relevant. She considers the equilibrium position to be zero gravitational potential energy. Complete the energy bar charts for the block-Earth-spring system when the block is initially released. When just released K U, U, When passing through equlibrium K U Us Block/Earth/Spring system when U = 0 at equlibrium Argumentation PART D: Use the results of your bar charts to support Dominique's claim that the zero point of gravitational potential energy does not affect the behavior of the block-Earth-spring system. Reference specific details of the students' energy bar charts in your answer.