Resultant Motion with Ball

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“The ball C is placed on a square frame between two upright wires, on each of which a ball slides so as to strike C when it descends. Let the ball A drop, and it will drive C to D... Let the ball B drop, and it will drive C to E; this is simple motion. Let A and B drop at the same instant, and they will drive C to F; this is resultant motion.” —Quackenbos 1859


G. P. Quackenbos A.M. A Natural Philosophy: Embracing the Most Recent Discoveries in the Various Branches of Physics, and Exhibiting the Application of Scientific Principles in Every-day Life (New York: D. Appleton and Company, 1859) 41


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