A pulley of radius 15 cm turns at 8 revolutions per second. What is the linear velocity of the belt driving the pulley in meters per second? Here is the way I did this--am I correct? v = 2pi r/T v = 2pi (15)/8 v = 94.2/8 v = 11.8
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incorrect ... T is not 8 ... 8 revolutions per second means $\displaystyle T = \frac{1}{8}$ sec. also, you need to pay attention to your units ... 15 cm = .15 m
12/5/08 Hi Skeeter-- Thanks for your help on the linear velocity problem. Joanie
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