Question: A heavy solid disk rotating freely and slowed only by friction applied at its outer edge takes 1 2 0 seconds to come to a

A heavy solid disk rotating freely and slowed only by friction applied at its outer edge takes

120

seconds to come to a stop. If the disk had twice the radius and twice the mass, but the frictional force remained the same, the time it would it take the wheel to come to a stop from the same initial rotational speed is

30

120

480

960

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