Question 536587
A helicopter blade is 2.75 m long and is rotating at 420 rpm. What is the linear velocity of the tip of the blade?
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v = 2.75*2*pi*420 meters/minute
=~ 7257 m/min
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A Huey rotor blade is 24 ft (7.3 m) long and does 330 rpm.  It's tip speed is
15136 m/min