A quarterback throws a pass that is a perfect spiral. In otherwords, the football does not wobble, but spins smoothly about anaxis passing through each end of the ball. Suppose the ball spinsat 6.3 rev/s. In addition, the ball is thrown with a linear speedof 29 m/s at an angle of 45 ° with respect to the ground. If theball is caught at the same height at which it left thequarterback's hand, how many revolutions has the ball made while inthe air?
