11_26_Angular_Momentum

11_26_Angular_Momentum - Find the final angular velocity of...

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Physics 211 11/26 HW Handout Name______________________ Fall 2001 Angular Momentum Due Thursday 11/29 1) A ring of mass m is dropped onto a rotating disk of mass 3m. Find the final angular velocity of the system if the initial angular velocity of the ring is zero and the initial angular velocity of the disk is ϖ i . Both have the same radius. Show your reasoning. 2) A merry-go-round (disk) of mass 5m has a mass of 1m at its outer edge.
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Unformatted text preview: Find the final angular velocity of the system if the initial angular velocity of the merry-go-round is ϖ i and the mass is pulled in half the radius of the disk. The mass can be treated as a ring since all the mass is at a radius r. Show your reasoning. ϖ = 0 ϖ i ϖ f = ? (want a fraction of ϖ i ) rotate together ϖ i ϖ f I ring = mr 2 I disk = 1 / 2 mr 2...
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This note was uploaded on 12/21/2010 for the course PHYS Physics 21 taught by Professor Larrywatson during the Fall '08 term at North Dakota.

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