A wind turbine’s blades are 28 m long and rotate at 21RPM. Find the rotational speed of the blades in radians per second.
rotational speed = W = 21 RPM
W = 21 * 2 Pie / 60
w = 21 * 2* 3.14 / 60
w = 2.198 rad /sec = 2.2 rad /sec
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