Lect08 - PHYS 172: Modern Mechanics Spring 2012 EXAM 1 is...

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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 Lect. 8 - Rate of Change of Momentum Read 5.1-5.4 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!
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TODAY • Forces on a System • Changing Momentum • Circular Motion 2
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Rules for Identifying Forces on a System • Choose "The System" • Draw arrows for all forces due to objects in the surroundings that interact with The System. – Objects that touch The System – Objects that interact from a distance • Label each force with the name of the object in the surroundings 3
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Example – Hanging Ball System: Ball Surroundings: Earth, Wire Free-body diagram F net = d p dt 4
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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.

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Lect08 - PHYS 172: Modern Mechanics Spring 2012 EXAM 1 is...

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