**75. 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 7.7 rev/s. In addition, the ball is thrown with a linear speed of 19 m/s at an angle of 55° with respect to the ground. If the ball is caught at the same height at which it left the quar- terback's hand, how many revolutions has the ball made while in the air?

**75. 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 7.7 rev/s. In addition, the ball is thrown with a linear speed of 19 m/s at an angle of 55° with respect to the ground. If the ball is caught at the same height at which it left the quar- terback's hand, how many revolutions has the ball made while in the air?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

**75. 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 7.7 rev/s. In addition, the ball
is thrown with a linear speed of 19 m/s at an angle of 55° with respect to
the ground. If the ball is caught at the same height at which it left the quar-
terback's hand, how many revolutions has the ball made while in the air?

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