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Flick finger11/12/2023 ![]() ![]() 25 weird things humans do every day, and why The amount of friction needed to make a snap work exists inside a "Goldilocks zone" - too little friction and not enough energy is stored in the tendons, and too much friction and more of the stored energy is dissipated as heat instead of motion, the researchers said. Once sufficient energy has been built up, the friction is overcome and the thumb and middle finger slide past each other, unleashing the snap. Friction between the thumb and middle finger plays the vital role of a latch by wedging the middle finger to the thumb and preventing it from moving. By fitting their experimental observations to an assortment of mathematical models, they found the best physical explanation for how snaps come about and their most fundamental component: friction.Īccording to the study, finger snaps work by using the arm muscles as a motor to load spring-like tendons in the fingers and arms with elastic potential energy, which is then released quickly to generate the incredible acceleration of the snap. To investigate the physics behind the gesture, the team analyzed a number of finger snaps with a high-speed camera while covering the snapping hand with a variety of materials. ![]() "This is how this whole thing got started, because we want to figure out the key ingredients required to snap our fingers." "We got into this heated debate, trying to understand if he could actually snap or not," Bhamla said. By placing the stones inside a metal "Infinity Gauntlet," Thanos planned to wipe out half of all the living creatures in the universe with a mere snap of his fingers.īut for some of the scientists, performing a finger snap while wearing a metal gauntlet was the step too far. (Image credit: PictureLux / The Hollywood Archive / Alamy Stock Photo)īhamla said the inspiration for the research came from an argument he had with his students after watching the 2018 Marvel Studios movie "Avengers: Infinity War," in which Thanos, an 8-foot (2.4 meter) purple warlord from Saturn's moon Titan, seeks out six powerful "Infinity Stones" that will grant him the ability to bend and reshape the fabric of the universe according to his will. Thanos may have had the infinity gauntlet, but he lacked friction. ![]()
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