# L2_19.pptx - Topics for Today Post-game analysis of first...

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• thisisbunk10
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Topics for Today Post-game analysis of first exam (Kletzing) Potential energy (8-1) Conservation of mechanical energy (8-2)

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Work and Potential Energy We’ve seen how work (in the physics sense) can increase the kinetic energy of an object. Work can also be used to put in energy that is stored in a system. This is called “Potential Energy” Energy can be transferred between potential and kinetic. 1.Start with ball at lowest point. 2.Do work to move ball up. 3.Release ball – energy changes from potential to kinetic and back.
Work and Potential Energy Quiz - If the pendulum ball is released from a given height, can it go higher on the return swing? 1. Yes 2. No •. Do demo 1M40.10 - Large Classroom Pendulum

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Work and Potential Energy We use the symbol U for potential energy. The change potential energy Δ U = - W . Let’s see if this makes sense for a mass in a gravitational field. Quiz - When I lift the mass, does the potential energy? 1. Increase 2. Decrease
Work and Potential Energy Potential energy increases when I lift the mass. What is the work done when I lift the mass? The force (gravity) points down, while the displacement is up.

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• Spring '12
• Unkown

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