ch10-p071 - 3 is the given density. We now use the parallel...

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71. The volume of each disk is π r 2 h where we are using h to denote the thickness (which equals 0.00500 m). If we use R (which equals 0.0400 m) for the radius of the larger disk and r (which equals 0.0200 m) for the radius of the smaller one, then the mass of each is m = ρπ r 2 h and M = R 2 h where ρ = 1400 kg/m
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Unformatted text preview: 3 is the given density. We now use the parallel axis theorem as well as item (c) in Table 10-2 to obtain the rotation inertia of the two-disk assembly: I = 1 2 MR 2 + 1 2 mr 2 + m ( r + R ) 2 = h [ 1 2 R 4 + 1 2 r 4 + r 2 ( r + R ) 2 ] = 6.16 10 5 kg . m 2 ....
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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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