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Question

x.Hmellpadding="0" cellspacing="0" border="0"> Question Details: A uniform disk of mass M = 5.1 kg has a radius of 0.10 m and is pivoted so that it rotates freely about its axis. A string wrapped around the disk is pulled with a force F equal to 23 N. (a) What is the torque being exerted by this force about the rotation axis? N · m (b) What is the angular acceleration of the disk? rad/s

Explanation / Answer

M = 5.1 kg R = 0.1 m F = 23 N (a) = R F (b) = I For a disk, I = (1/2)MR2 . Solve for (c) t = 4.7 s = t (using from part (b)) (d) = (1/2) t2

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