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This 1 page Study Guide was uploaded by Usman Qureshi on Wednesday November 18, 2015. The Study Guide belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 20 views.
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Date Created: 11/18/15
3 Last Lecture 3 Potential Energy diagrams Potential Energy of springs 3Today 3 Conclusion of energy discussion 3 The next important conservation law Momentum 3 Important Concepts 3 Momentum is a vector 3 Think carefully about internal versus external forces 801 L Fall 2005 1132005 Important Reminders 3 Exam 2 is tomorrow at 10 am 3 Covers material through last Thursday s lecture last Friday s problemsolving and Pset and Monday s MasteringPhysics assignment 3 QampA review session tonight 7830pm 3MasteringPhysics due next Monday 3 No class next Friday 3 Pset 7 due next Thursday 801 L Fall 2005 1132005 WorkEnergy Summary gtWAEEF E EPEKE IltEgmv2 gtPE gravity 02 9 W JFdE IWI lFlldslcos0 3Every force goes in the work term or in the PE 3Minima and maxima of the PE correspond to FO which are equilibrium points PE minima are stable equilibrium points maxima are unstable 801 L Fall 2005 1132005 Momentum 3Very simple formula 3 2mii7i 3 Note the vector addition 3This quantity is conserved another fundamental property of our universe derivable from Fma 3 I could also claim Fma is derivable from momentum 3Sometimes it is impractical to include the whole universe in the system under study 3 In this case we say momentum is conserved only if 3 No net external forces acting on the system 3 Or study the system only over a very short time span 801 L Fall 2005 1132005
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