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6) A mass-spring system consists of a 250-g mass hanging from a spring with a spring constant of k 0.18 J/m2. The mass is pulled down 7.1 cm from its equilibrium position and released from re a) How much work did the person do when she pulled the spring down from its equilibrium position? Assume that the mass was at rest before she pulled it down, and before it was released. (Use the energy-interaction model, not the expression W FavgAx, to determine the work.) b) Construct an energy system diagram for each of the following final conditions to predict the speed of the mass after it is released, and when it is: 1. moving up through the equilibrium position. 2. moving down through equilibrium. 3. 5.0 cm below the equilibrium position, moving down.
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