Question

5) The blade of a wind turbine are 224 feet long. what is the distance

traveled by a point on it's tip as the blade rotates 5/4 of a revolution?

Answer 1

Explanation:

first note that 5/4 of a revolution comes out to (5/4)(2π) radians, or

5/8 radian. Thus, the distance traveled by the point is

s = rФ, where r is the radius and Ф is the angle through which the blade rotates. Here we have:

s = (224 ft)(5/4)π ft