This sample page seems to contain an error:
“Sloth grabs the handle and begins to turn the wheel. This rotates the axle, which turns much faster than the wheel.”
In what sense does the axle turn faster than the wheel? It looks like the sloth is applying force at the perimeter of the wheel (hence it acting as a rotating lever toward the axle). The wheel and axle have the same angular velocity, and if anything, the velocity of the axle’s surface is lower. Am I missing something here?
My first thought on seeing that page as well. I came to the comments wondering if I was the only one.
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