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A wheel turns at 1200 revolutions per minute. Its angular speed in rad/s is
A20π rad/s
B40π rad/s
C120π rad/s
D1200π rad/s
Answer & Solution
Correct answer: B. 40π rad/s
1200 rpm is 20 revolutions per second, and 20 x 2π = 40π rad/s.
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