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A ring-shaped wheel with a mass of and a radius of rotates at an angular velocity of . It is been placed on the ground so that it does not slip when in contact with the ground. How fast is it moving on the ground?
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and a radius of 
rotates at an angular velocity of 
. It is been placed on the ground so that it does not slip when in contact with the ground. How fast is it moving on the ground?
.
