At the tip of the blade, the speed, v = rω
Angular velocity, ω = 2πf
Modern wind turbines are larger than they appear, and despite their apparently lazy motion, the speed of the blades' tips can be quite high-many times higher than the wind speed. A turbine has blades 59m long that spin at 13 rpm.
a) At the tip of a blade, what is the speed?
b) At the tip of a blade, what is the centripetal acceleration?