Lect07 - Spring 2012 PHYS 172: Modern Mechanics EXAM 1 is...

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Unformatted text preview: Spring 2012 PHYS 172: Modern Mechanics EXAM 1 is next week Time: 8:00-9:30 pm Wed Feb 8 Place: Elliott Hall aterial: lectures 1 , HW 1 , Recitations 1 , Labs 1 Lecture 7 Speed of Sound in a Solid, Buoyancy Read 4.9 4.13 1 Material: lectures 1-8, HW 1-8, Recitations 1-4, Labs 1-4 Problems: multiple choice, 10 questions (70 points) write-up part, hand graded (30 points) Equation sheet: provided with exam Practice exam + equation sheet: will be posted at the end of this week Note: no lecture on Thursday Feb 9! Speed of sound in solids s k m = Qualitatively: Larger , larger v Larger d , larger v Detailed derivation: v d = Speed of sound in a solid 2 Derivative form of the Momentum Principle The Momentum Principle & p = & F net t & p t = & F net The rate of the momentum change is equal to force Works only if force is constant during t If force changes introduce instantaneous rate of change: d & p dt lim t & p t The momentum principle d & p dt = & F net 3 Newton s Second Law...
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This note was uploaded on 02/06/2012 for the course PHYS 172 taught by Professor ? during the Spring '08 term at Purdue University-West Lafayette.

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Lect07 - Spring 2012 PHYS 172: Modern Mechanics EXAM 1 is...

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