Frisbees
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The Frisbee was invented by Walter Frederick Morrison in the 1950s and over 200 million have been sold since then. It flies using aerodynamic principles like Bernoulli's principle and Newton's third law, where the rotating disc creates lift as more air pressure is applied underneath. Angular momentum helps keep Frisbees stable in flight, with faster throws resulting in more stability. Frisbees allow for outdoor recreation and are often used on college campuses.
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