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can you help me with these old

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PART 2: Rotational Inertia of the Ring
Before we do our measurements, it would be smart to make an estimate of what we should expect. Theoretically, the rotational inertia of a thick ring
is given by with the mass of the ring, the outer radius, and the inner radius.
QUESTION 12: Measure the dimensions of the ring. Outer radius: 38 mm Inner radius: 27 mm QUESTION 13: Use a scale to measure the mass of the ring. Mass of the ring: 490 grams
QUESTION 14: Calculate the theoretical value of using the
measurements of the mass and the diameters. Expected rotational inertia of the ring: QUESTION 15: Now place the ring on top of the disk such that the
tiny pins lock into the disk. Follow the steps in the procedure section
and fill in Table 2 below. Do four runs, each with a different mass
added to the hanger as indicated. Additimnll mass Total mass Angular acceleration Calculated ml: ' ' lg] ol" hanger lg] [rnds'fl inertia [kg c1113]
None TYPE ANSWER 2 Run #1 (just the hanger) HERE 1.31 rad/s TYPE ANSWER HERE Run #2 5 gram TYPE ANSWER 2.48 rad/s2 TYPE ANSWER HERE
HERE Run #3 10 gram TYPE ANSWER 4. l 3 rad/52 TYPE ANSWER HERE
HERE Run #4 15 gram WP%%§:WER 5.40 rad/s3 TYPE ANSWER HERE Table 2: Measurements of the angular acceleration, and the calculated
total rotational inertia. QUESTION 16: Use the rightmost column of Table 2 to calculate the
average . Average rotational inertia of the ring+disk+wheel together:

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Subject: Physics, Science

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