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334_Physics ProblemsTechnical Physics

334_Physics ProblemsTechnical Physics - 336 P11.33 Angular...

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336 Angular Momentum P11.33 (a) The table turns opposite to the way the woman walks, so its angular momentum cancels that of the woman. From conservation of angular momentum for the system of the woman and the turntable, we have L L f i = = 0 so, L I I f = + = woman woman table table ω ω 0 and ω ω table woman table woman woman table woman woman woman table = F H G I K J = F H G I K J F H G I K J = − I I m r I v r m rv I 2 ω table 2 kg 2.00 m m s kg m rad s = − = − 60 0 1 50 500 0 360 . . . a fb g or ω table rad s counterclockwise = 0 360 . a f (b) work done woman woman 2 table 2 = = = + K K m v I f 0 1 2 1 2 ω W = + = 1 2 60 1 50 1 2 500 0 360 99 9 2 2 kg m s kg m rad s J 2 b gb g e j b g . . . P11.34 When they touch, the center of mass is distant from the center of the larger puck by y CM g 4.00 cm cm g g cm = + + + = 0 80 0 6 00 120 80 0 4 00 . . . . a f (a) L r m v r m v = + = + × × = × 1 1 1 2 2 2 2 3 3 0 6 00 10 80 0 10 1 50 7 20 10
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