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Projectile Motion Gets the Hose
1.R. Wolfson, Essential University Physics, 1st ed. (Pearson/Addison-Wesley, San Francisco, CA, 2007), Chap. 3, prob. 73, p. 48.
7.A. E. G. Falcão Jr., R. A. Gomes, J. M. Pereira, L. F. S. Coelho, and A. C. F. Santos, “Cellular phones helping to get a clearer picture of kinematics,” Phys. Teach. 47, 167–168 (March 2009).
8.See, for example, Chap. 15, p. 249 in Ref. 1.
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Students take a weekly quiz in our introductory physics course. During the week in which material focused on projectile motion, we not-so-subtly suggested what problem the students would see on the quiz. The quiz problem was an almost exact replica of a homework problem1 we worked through in the class preceding the quiz. The goal of the problem is to find the launch speed if the final horizontal and vertical positions and launch angle are given. Figure 1 shows a schematic of the trajectory.
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