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Two children are playing with a roll of paper towels. One child holds the roll between the index fingers of her hands so that it is free to rotate, and the second child pulls at constant speed on the free end of the paper towels. As the child pulls the paper towels, the radius of the roll of remaining towels decreases.
a)How does the torque on the roll change with time?
increases
decreases
stays the same
b)How does the angular speed of the roll change in time?
increases
decreases
stays the same
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