PHYS171_f11_lecture_25

PHYS171_f11_lecture_25 - PHYS171 Principles of Physics I...

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PHYS171 Principles of Physics I Chapter 7 Definition of “work” for a constant force When a particle moves a distance s under constant force F the work is the distance multiplied by the component of the force which is parallel to s s F Fs s F W r r = = = θ cos parallel s cos parallel F F = F r
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Chapter 7 Definition of “work” for varying force When a particle moves a distance ds under constant force the work is the distance multiplied by the component of the force which is parallel to ds = = = s d F W s d F Fds dW r r r r θ cos ds F r cos parallel F F = Chapter 7 Definition of “work” varying force = = = s d F W s d F Fds dW r r r r cos F cos s When a particle moves a distance ds under constant force the work is the distance multiplied by the component of the force which is parallel to ds
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Chapter 7 Mathematical digression scalar product of two vectors θ cos AB B A = r r z z y y x x z y x z y x B A B A B A B A k B j B i B B k A
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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_25 - PHYS171 Principles of Physics I...

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