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A stone on a string of length 0.5 m circles twice every second. What is its linear speed?
AAbout 6.3 m/s
BAbout 3.1 m/s
CAbout 1.6 m/s
DAbout 12.6 m/s
Answer & Solution
Correct answer: A. About 6.3 m/s
v = 2 pi R nu = 2 x 3.14 x 0.5 x 2 = 6.28 m/s.
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