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Unformatted text preview: one without the ring on the disk and one with the ring on the disk. Predictions Our group predicted that the moment of inertia for the experiment with the ring on the disk will be larger than the moment of inertia for the experiment without the ring on the disk. We have observed, than when there is a ring on the disk, the mass goes down slower. Mathematically, we start from the equation of angular acceleration: α r a m = r m a a = Moment of inertia of the system: ) 2 1 ( 2 2 2 1 1 R M R M I + = Energy conservation: mgh E = 1 2 2 2 2 1 2 1 Iw mv E + = I mr mg w + = 2 2 π 2 2 2 t w f = = w T π 2 = Experiment and results: Mass is released from h= 0.33 m Trial 1 Trial 2 m 1= 1500 g t 1 =3.18s+0.01s m 1= 1500 g+10g m 2= 1500 g+10g t 1 =3.61s+0.01s m m R 01 . 61 . 2 ± = r = (9.5*(10^4) m )+(1*10^4) R 1 = 0.115 m +0.005 m...
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 Spring '10
 Lichfield
 Physics, Angular Momentum, Inertia, Moment Of Inertia, Rotation, disk

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