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# Torque and angular acceleration of a ring and bar combination.

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A uniform thin ring, mass M= 6 kg and radius R= .35 m, with a bar of mass m= 4.5 kg across its diameter, is mounted on frictionless bearings at its center. A cord wrapped on the surface of the ring suspends a weight W= 14.7 nt. See ATTACHMENT1 for a diagram showing parameters and stating physics required.

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The expert analyzes the torque and angular acceleration of a ring and bar combination. A uniform, thin ring is analyzed.

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Solution:
Note the physics statements A-E on ATTACHMENT2.
Step 1.
Using statements D and E you should find the total moment of inertia to be:
(6) I = .919 kg ...

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