ch11-p038 - rotational inertias (see item (c) in Table...

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38. We relate the motions of the various disks by examining their linear speeds (using Eq. 10-18). The fact that the linear speed at the rim of disk A must equal the linear speed at the rim of disk C leads to ω A = 2 ω C . The fact that the linear speed at the hub of disk A must equal the linear speed at the rim of disk B leads to ω A = 1 2 ω B . Thus, ω B = 4 ω C . The ratio of their angular momenta depend on these angular velocities as well as their
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Unformatted text preview: rotational inertias (see item (c) in Table 11-2), which themselves depend on their masses. If h is the thickness and ρ is the density of each disk, then each mass is ρπ R 2 h . Therefore, L C L B = (½) ρπ R C 2 h R C 2 ω C (½) ρπ R B 2 h R B 2 ω B = 1024 ....
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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