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OpenStudy (rizags):
a physics teacher swings an 0.5kg stopper attached to a 2m string at a velocity of 12 m/s. As the stopper swings in a circle, the string gets shorter and shorter as it wraps around her finger. What is the velocity of the stopper when the string is 0.5m long?
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OpenStudy (irishboy123):
conservation of angular momentum
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