1. A quarterback throws a pass that is a perfect spiral. In other words, the football does not wobble, but spins smoothly about an axis passing through each end of the ball. Suppose the ball spins at 7.00 rev/sec. In addition, the ball is thrown with a linear speed of 12.0 m/s at an angle of 39.0 with respect to the ground. If the ball is caught at the same height at which it left the quarterback's hand, how many revolutions has the ball made while in the air? Page 6 2. A baseball player hits a home run, and the ball lands in the left-field seats, 9.00 m above the point at which it was hit. It lands with a velocity of 39.0 m/s at an angle of 28.0 below the horizontal. The positive directions are upwards and to the right in the drawing. Ignoring air resistance, find the magnitude and direction of the initial velocity with which the ball leaves the bat. 28 m/s