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Physicist Andreas Wahl Risks Life To Prove A Fundamental Property Of Physics

To demonstrate a basic property of physics, Norwegian physicist Andreas Wahl tied himself to the side of building 45 feet off the ground.

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The only thing keeping him from falling and potentially breaking a body part, or several, was a cable with a weight attached to the end.

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While Wahl’s experiment seems risky, he’s actually perfectly safe. And that’s all thanks to a fundamental property of physics called centripetal force.

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When Wahl’s colleagues released the weight, both he and it started to fall. Wahl fell straight under the force of gravity, but the weight, because it was placed at a distance from Wahl,  traced an arc through the air, just like a swinging pendulum.

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