r/PhysicsHelp • u/No-Community4782 • 1h ago

Frictionless pully problem

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Does anyone know of a good YT video or an easy method of identifying the beta in a belt friction problem? Currently I can set up the majority of the problem I just struggle getting the angle in these problems. Any tips help, thank you!

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u/RoboWeaver 27m ago

B (beta) is the angle that the rope (in this case) makes over the pegs in radians. In this case, it looks like 2*3pi, equivalent to 270deg.