PHYS171_f11_lecture_40

PHYS171_f11_lecture_ - PHYS171 Apparatus is in the… E a r l y 2 t h c e n P h y s i c s d e p a r t C o m p a r a t i v e l i H o m e l a n d s e

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Unformatted text preview: PHYS171 Apparatus is in the… E a r l y 2 t h c e n . . . P h y s i c s d e p a r t . . . C o m p a r a t i v e l i . . . H o m e l a n d s e c u r . . . 4% 17% 9% 70% 1. Early 20 th century school of dentistry 2. Physics department 3. Comparative literature department 4. Homeland security interrogation office Chapter 10 Rotation What’s missing from our analogy? Conservation of (angular) momentum. Chapter 11 Angular Momentum dt p d F r v = conservation of linear momentum To define angular momentum we take the cross product of both sides of this equation with a radius vector from some axis of rotation dt p d r dt p d r F r r r r r r v r × = × = × τ This shows that torque causes a change in the linear momentum of our system. φ sin AB B A = × r r Cross product is a vector perpendicular to both A and B. φ Chapter 11 Cross Product vs Dot Product φ sin AB B A = × r r Cross product is a vector perpendicular to both A and B....
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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_ - PHYS171 Apparatus is in the… E a r l y 2 t h c e n P h y s i c s d e p a r t C o m p a r a t i v e l i H o m e l a n d s e

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