Holding a torque wrench at different locations on the handle actually changes the applied torque for length-dependent wrenches. In short: "torque is torque" doesn't always apply.
The math in this video explains this real-world phenomenon:
https://youtu.be/RsMxtEx0uik
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I created this video because @parktool pointed out a fundamental flaw in testing torque wrench accuracy by sliding a fixed weight to different locations along the handle (something I did in a previous video).
The mathematical result in this video agrees with the experimental results, but feel free to point out any errors you find; we're always open to constructive criticism here.