# lab10 - Disk Initial 64cm 1 147 12.36 2 153 13.27 3 160...

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PHY 241 University Physics Experiment 10: The Moment of Inertia Jacob Matson Lab Partner: Chip Pitkin Performed: Mar. 30, 2006 Submitted: Apr. 06, 2006

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Purpose: To compare the experimental value for the moment of inertia with the theoretical value. Theory: The moment of inertia is a measure of the opposition to change in rotational motion offered by an object. The above statement is equivalent to Newton’s second law rotational motion. Now consider the yo-yo. When released, it will fall some distance over time while experiencing acceleration. The moment of inertia can be computed from the integral definition. Apparatus: Disk, square, spindle, string, timer, triple beam balance, micrometer, calipers, meter stick, wrench, and support rod with the pendulum clamp. Data: Spindle: 40g 0.476 Disk: 1218 22.9 Square: 701 30.5 Trial y t Square Initial: 60.5cm 1 162 10.43 2 135 8.5 3 147 9.38 4 152 9.9 5 149 9.59
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Unformatted text preview: Disk Initial: 64cm 1 147 12.36 2 153 13.27 3 160 13.84 4 156 13.34 5 144 12.31 Calculations: SqAvg = Sum of the y and t values of the square divided by 5. SqExp = expected result for moment of inertia using equation 10-6. SqAct = actual equation for moment of inertia. Tabulated Results: SqAvg SqAvg SqExp SqAct %Error 88.5 9.56 0.415849 0.010868 37.26213 DiskAvg DiskAvg DiscExp DiscAct-----------88 13.024 0.716555 0.031937 21.43681 Summary: This lab was to illustrate the expected values of the moment of inertia. For some reason, equation 10-6 did not yield the same results as the actual equations for moment of inertia for reasons of which I am uncertain. We found that the moment of inertia changes based on the shape of the object in motion. For instance, the disc has a much higher moment of inertia than the square....
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## This lab report was uploaded on 04/09/2008 for the course PHY 241 taught by Professor Puntenney during the Spring '06 term at Point Loma.

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lab10 - Disk Initial 64cm 1 147 12.36 2 153 13.27 3 160...

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