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## Homework Statement

I am first learning about angular motion and came across this formula while doing a homework problem. Can anyone explain to me why ɪa = TR? That is the moment of inertia * angular acceleration = tension in rope * radius.

For reference, in the problem it's a stunt guy jumping off a building with rope tied around his waist connected to a cylindrical drum with rope wound around it.

I'm only interested in knowing why those two quantities equal each other. Thanks in advance!

## Homework Equations

torque = ɪ

torque = TR

ɪa = TR

## The Attempt at a Solution

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I already solved the problem, just need clarification.