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This tag is for non-relativistic material strings, such as, e.g., a guitar string. PLEASE DO NOT USE THIS TAG for relativistic strings and string theory.

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In a simple pendulum, what is the tension in string either $T= mg\cos\alpha$ or $T= mg/\cos\...

In a simple pendulum, $\alpha$ is angle between string and vertical, $T$ is tension in string and $mg$ be pull on the bob. …
Tom Curran's user avatar