4.  Given v=rw, where V is linear speed in m/s, r is radius of rotation in m and w is angular velocity in radians/second, compare and contrast the curvilinear path of the golf club head (i.e., club length) of the 9 iron vs. the driver from the 
end of the wind-up phase to contact with the golf ball; describe what useful information this data provides for helping to explain the linear distance traveled by a golf ball struck with each club type.