Chapter8_4-5_FA05 - Quick Concept Review and Fact Check...

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Quick Concept Review and Fact Check
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0 / 100 Cross-Tab Label Which of the following processes are due to non-conservative forces? 1. A only 2. B only 3. C only 4. A and B 5. B and C A. Hockey puck slides over ice at constant speed. B. Golf ball rolls to a stop over rough grass. C. Car moves at constant speed with constant power from engine.
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0 / 100 Cross-Tab Label Name the following terms in the correct order. 1. Gravitational potential, Kinetic energy, Spring Potential 2. Spring potential, Kinetic energy, gravitational potential. 3. Kinetic energy, gravitational potential, Spring potential. 2 2 1 Kx 2 2 1 Mv MgH
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Chapter 8.4-8.5 Work, Force and Energy redux. The most important messages are these: Mechanical energy is given by: E = K + U Energy changes only if there are non-conservative forces: E = E f – E i = W nc This means that Mechanical Energy is CONSERVED if W nc = 0. SUMMARY RELATIONSHIPS: W total = W c + W nc = K W c = - U W nc = E
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This is a type of “book-keeping” for energy. E = K + U Starting with the definition of mechanical energy… Then the changes in the energy terms are also related…. E =
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This note was uploaded on 08/16/2011 for the course PHY 2053 taught by Professor Vellaris during the Fall '08 term at University of Central Florida.

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Chapter8_4-5_FA05 - Quick Concept Review and Fact Check...

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