Chapter 8 Notes

Chapter 8 Notes - Chapter 8: Conservation of Energy...

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Chapter 8: Conservation of Energy Potential Energy of a Conservative Force - The potential energy of the spring represents the capacity of the spring to do work by virtue of its deformation - When we compress a spring, we store latent work in it, which we can recover at a later time by letting the spring push against something - We can conclude that for the particle moving under the influence of the spring force, the sum of the kinetic and elastic potential energies is constant o E = K + U = ½ mv 2 + ½ kx 2 - Conservative = W = -U 1 + U 1 = 0 - A round trip that starts and ends at x 1 , the work the force does during the outward portion of the trip is exactly the negative of the work the force does during the return portion of the trip, therefore the net work is zero - Friction is an example of a nonconservative force - The work done by the friction during the outward portion is negative, and same with the inward portion, which means that the work done will always be negative - - This is the potential energy function by integration
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This note was uploaded on 04/11/2008 for the course PHYS 142 taught by Professor Kolomeisky during the Spring '08 term at UVA.

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Chapter 8 Notes - Chapter 8: Conservation of Energy...

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