Lecture11Notes

Lecture11Notes - Physics 121. Tuesday, February 26, 2008....

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1 Frank L. H. Wolfs Department of Physics and Astronomy, University of Rochester Physics 121. Tuesday, February 26, 2008. Frank L. H. Wolfs Department of Physics and Astronomy, University of Rochester Physics 121. Tuesday, February 26, 2008. Course Information Quiz Topics to be discussed today: Review of Conservation Laws (kinetic energy, potential energy, conservative and con-conservative forces). Dissipative forces. Gravitational potential energy. Frank L. H. Wolfs Department of Physics and Astronomy, University of Rochester Course information. Exam # 1. On Thursday February 28 between 8 am and 9.30 am the ±rst midterm exam of Physics 121 will be held: Material covered: Chapters 1 - 6 of our text book. Location: Hubbell. There will be a normal lecture after the exam (at 9.40 am in Hoyt). A Q&A session on the material covered on exam # 1 will take place on Tuesday evening 2/26 between 9 pm and 11 pm in Hoyt (location needs to be con±rmed). There will be extra of±ce hours on Tuesday 2/26 and Wednesday 2/28: Tuesday: 1 - 4 pm (B&L 304) + 7 - 9 pm (POA library, 2 TAs) Wednesday: 1 - 3 pm (B&L 304) + 2.45 - 4.45 pm (POA library, 1 TA) + 7 - 10 pm (2 - 3 TAs)
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2 Frank L. H. Wolfs Department of Physics and Astronomy, University of Rochester Course information. Exam # 1. During workshops on Tuesday 2/26 and Wednesday 2/27, the focus will be exam # 1. You can attend any (or all) workshops on these days. Bring your questions! There will be no workshops and ofFce hours on Thursday 2/28 and ±riday 2/29. You will receive the exam back during workshop during the week of March 3. Any corrections to the grades of your grade can only be made by me, not by your TAs. The TAs will not see the exam until you see it. Frank L. H. Wolfs Department of Physics and Astronomy, University of Rochester Physics 121. Quiz lecture 11. The quiz today will have 3 questions. Frank L. H. Wolfs Department of Physics and Astronomy, University of Rochester Conservation of energy. A review. The mechanical energy of a system is deFned as the sum of the kinetic energy K and the potential energy U : E = K + U If the total mechanical energy is constant, we must require that Δ E = 0, or K + U = 0 We conclude that any change in the kinetic energy K must be accompanied by an equal but opposite change in the potential energy U .
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3 Frank L. H. Wolfs Department of Physics and Astronomy, University of Rochester Conservation of energy.
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This note was uploaded on 10/20/2010 for the course PHY PHY 121 taught by Professor Wolfs during the Spring '08 term at Rochester.

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Lecture11Notes - Physics 121. Tuesday, February 26, 2008....

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