phy2048 lecture13

phy2048 lecture13 - 7-1 What Is Physics 7-2 What Is...

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Unformatted text preview: 7-1 What Is Physics? 7-2 What Is Energy?7-3 Kinetic Energy7-4 Work7-5 Work and Kinetic Energy7-6 Work Done by the Gravitational Force7-7 Work Done by a Spring Force7-8 Work Done by a General Variable Force7-9 PowerChapter 7:Kinetic Energy and WorkChapter 7 Homework3, 5, 7, 13, 19, 20, 28, 29, 37, 43, 48, 57Work Done by a Spring Force)(kxFdkFxs-=-=Sample Problem 7-8: Another spring-block system?compressedisspringthedistanceby what Find.)(N/m,750m/s,50.kg,40.dvkvmfi====Sample Problem 7-7: Spring-block system on horizontal surfaceSpring Force: Hooke’s Law221221fiskxkxW-=∫∫-==fifixxxxxsdxkxdxFW)(PowerAverage PowertWP∆=avgUnitWatt (W)1 W = 1 J/s1 W = 1 kg·m2/s31 hp = 746 WInstantaneous PowerdtdWP=rdFdW⋅=vFP⋅=Sample Problem 7-11:?Findm/s.3N,.4N,.221PvFF===8-1 What Is Physics? 8-2 Work and Potential Energy?8-3 Path Independence of Conservative Forces8-4 Determining Potential Energy Values8-5 Conservation of Mechanical Energy...
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This note was uploaded on 04/17/2008 for the course PHY 2048 taught by Professor Chen during the Fall '08 term at UNF.

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phy2048 lecture13 - 7-1 What Is Physics 7-2 What Is...

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