L27_phys131_21nov07

# L27_phys131_21nov07 - 1 T 2 + m 1 T 1 m 1 g m 2 T 2 m 2 g (...

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Summary for Lecture 27 on November 21, 2007: There were no new concepts, but we used most of the following: ( 29 . disk uniform MR 2 1 I . ring MR I . positive is rotation ) CCW ( clockwise Counter I positive is CCW sin F r F r I 2 1 K 2 t a m F , Also t 2 1 t 2 COM 2 COM i 2 R i f 2 i 2 f 0 i 2 0 0 = = - = = × = = - = - + = = + + = α τ θ ϖ θ r F

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Problem Solving Technique In the old days, we used: This really is two equations, one each for x and y. However, sometimes we need a 3 rd equation: We worked through the following hard problem on Friday, which I strongly recommend that you understand: a m F i = = α τ I i
Disk pulley with mass M and radius R m 1 m 2 T
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Unformatted text preview: 1 T 2 + m 1 T 1 m 1 g m 2 T 2 m 2 g ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 2 1 2 1 2 1 2 2 1 i 2 1 2 1 2 1 2 2 2 1 1 1 m m M 2 1 g m m a : equation force summed the in this Put Ma 2 1 T T R a MR 2 1 90 sin RT 90 sin RT equation rd 3 a need so , unknowns 3 I equations the added a m m T T g m m a m g m T a m T g m + +-= =- =-= + =---=-=-...
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## This note was uploaded on 04/09/2008 for the course PHYS 131 taught by Professor Reay during the Fall '08 term at Ohio State.

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L27_phys131_21nov07 - 1 T 2 + m 1 T 1 m 1 g m 2 T 2 m 2 g (...

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