Lect10-1

Lect10-1 - PHYS 172: Modern Mechanics Fall 2009 Lecture 10...

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Fall 2009 PHYS 172: Modern Mechanics Lecture 10 – The Energy Principle: Multiparticle Systems Read 5.8 – 5.15
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Reading Question: A little calculus review…. Consider a purely one-dimensional problem, where a particle’s position as a function of time is x(t). The speed is then v=dx/dt, and acceleration is a=dv/dt. The particle is moving in simple harmonic motion: x(t)=Acos( ω t) . If A=0.3m and ω =2 s -1 , what is the maximum value of the particle’s acceleration? A. 1.2 m/s 2 B. 0.6 m/s 2 C. 4.0 m/s 2 D. 0.18 m/s 2 E. 0.075 m/s 2
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CLICKER QUESTION #1 Reading Question (Sections 5.1 – 5.7) (This is a closed-book quiz, no consulting with neighbors, etc.) We can apply the concept of potential energy to which of the systems below? 1 2 A) System 1 only B) System 2 only C) Systems 1 and 2 D) Neither
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Today’s Lecture • Multiparticle Systems and Potential Energy • Relationship of Force and Potential Energy • Energy Graphs
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Energy principle (single particle system): where energy is and work is Last Time: Single Particle System set heat = 0 for now single particle system E W Q ! = + 2 2
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This note was uploaded on 10/26/2009 for the course CHM 111 taught by Professor Staff during the Spring '08 term at Purdue.

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Lect10-1 - PHYS 172: Modern Mechanics Fall 2009 Lecture 10...

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