09_ChapSummary

09_ChapSummary - SUMMARY The goals of Chapter 9 have been...

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Before-and-after pictorial representation Define the system. Use two drawings to show the system before and after the interaction. List known information and identify what you are trying to find. collision impulsive force momentum, impulse, J x p r impulse-momentum theorem momentum bar chart impulse approximation total momentum, P r isolated system law of conservation of momentum perfectly inelastic collision explosion S U M M A R Y The goals of Chapter 9 have been to introduce the ideas of impulse and momentum and to learn a new problem-solving strategy based on conservation laws. General Principles Law of Conservation of Momentum The total momentum of an isolated system is a constant. Thus Newton’s Second Law In terms of momentum, Newton’s second law is F r 5 dp r dt P r f 5 P r i P r 5 p r 1 1 p r 2 1 c Solving Momentum Conservation Problems MODEL Choose an isolated system or a system that is isolated during at least part of the problem.
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