Question 115106: An airplane propeller whose blades are 5.50 feet long is rotating at 2400 rpm. Find the linear speed of a point on the end of the blade. Answer by solver91311(24713) (Show Source):
You can put this solution on YOUR website! Unless something is horribly wrong, the end of a propeller blade travels in a circle. If the blade is 5.5 feet long, presumably measured from the center of the propeller dome, then the circle described by the end of the blade has a radius of 5.5 feet. Therefore, the circumference of the circle is given by feet.
Since the propeller is rotating at 2400 rpm, the tip of the blade is travelling feet per minute or feet per minute, which is to say feet per second or miles per hour.
Since the problem did not say to compute to some nearest decimal place accuracy, I left the answers in their exact form.
