problem10_72

# University Physics with Modern Physics with Mastering Physics (11th Edition)

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10.72: (a) α α R a I τ = = Σ T and 2 T T 2 2 m/s 50 kg 4.00 N 200 2 2 1 2 1 = = = = = M P a R a MR MR PR α Distance the cable moves: 2 2 1 at x = ( 29 ( 29 ( 29 s m 5 . 70 s 41 . 1 m/s 50 0 s. 41 . 1 m/s 50 2 1 m 50 2 0 2 2 = + = + = = = at v v t t (b) For a hoop, , 2 MR I = which is twice as large as before, so T and a α would be half as large. Therefore the time would be longer. For the speed,
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