100924 - Physics 121 9/24/10 9/24/10 Physics 121 1 9/24/10...

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Physics 121 9/24/10 Prof. E. F. Redish 1 9/24/10 1 Physics 121 9/24/10 3 Physics 121 9/24/10 4 Physics 121 ± ± a F m net = Why footholds?
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Physics 121 9/24/10 Prof. E. F. Redish 2 9/24/10 6 Physics 121 9/24/10 7 Physics 121 9/24/10 8 Physics 121 A B A ± N hand A ± ± N BA ± ± f table A ± B ± f table B ± ± N AB ± We’re only considering horizontal motions and pForces!
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Physics 121 9/24/10 Prof. E. F. Redish 3 9/24/10 10 Physics 121 9/24/10 11 Physics 121 9/24/10 12 Physics 121 A+B ± N hand A B ± + ± ± a m N AB hand A B + + ± + = 1 Assuming no friction!
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Physics 121 9/24/10 Prof. E. F. Redish 4 Physics 121 A B B ± N AB ± A ± N hand A ± ± N BA ± ( 29 A B A hand A A N N m a ± ± + = ± ± ± 1 B A B B N m a ± = ± ± 1 9/24/10 14 Physics 121 () mm aN ma N N N N A B hand A A hand A B A B A B hand A B A A B += =+ = + + ± ±± ± ±±±
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This note was uploaded on 12/28/2011 for the course PHYSICS 121 taught by Professor Shawhan during the Spring '10 term at Maryland.

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100924 - Physics 121 9/24/10 9/24/10 Physics 121 1 9/24/10...

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