PHYS171_f11_lecture_26

PHYS171_f11_lecture_26 - PHYS171 Principles of Physics I...

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Unformatted text preview: PHYS171 Principles of Physics I Photo was taken in M a r y l a n d V i r g i n i a B o s t o n N e w J e r s e y N e w Y o r k U l s t e r B a n g c o c k 22% 4% 39% 4% 4% 13% 13% 1. Maryland 2. Virginia 3. Boston 4. New Jersey 5. New York 6. Ulster 7. Bangcock Chapter 7 Review: Work on a free body results in change of kinetic energy Assume definition of work Assume work is performed on a free body Use Newtons second law to rewrite the equation in terms of velocities { K.E. initial 2 K.E. final 2 2 2 i f x x x mv mv dx F W f i = = 3 2 1 Contrast: When dealing with Newtons Laws we encountered a force acting for a specified time. Now we deal with force acting over a specified distance . Chapter 7 Last time A 2kg mass slides on a frictionless surface. It is initially moving at 1 m/s, and a force of 3N acts on it as it slides. How fast is it going after it has slid a distance of 5 meters?...
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This note was uploaded on 12/29/2011 for the course PHYSICS 171 taught by Professor La porta during the Fall '11 term at Maryland.

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PHYS171_f11_lecture_26 - PHYS171 Principles of Physics I...

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