#PhysicsFactlet (214)
Coriolis force: if your frame of reference is rotating, objects that are in fact moving in a straight line looks to you like they are bending sideways, like there was a lateral force acting on them.pic.twitter.com/OLQlkMeKQh
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Replying to @j_bertolotti
I’m confused by the graphics. I would have expected the ball to bend in the left-hand figure.
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Replying to @j_bertolotti
No, not friction. Maybe I am just not understanding the green background or which ref frame is still
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Replying to @d_faccio @j_bertolotti
The nonrotating reference frame is the one where the ball moves in a straight line.
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This is the whole problem, though, right? As usual, we're not paying close attention to what we mean; we're glibly relying on familiar words, without interrogating their meanings. What is a straight line? No satisfactory answer can be given without reference to Desargues/Pappus.
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I'm trying to help someone with an elementary question here. I'll be more direct: the frame at left is the non-rotating frame, since the ball in that movie is moving in a straight line.
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"Everything should be made as simple as possible, but not simpler." This stuff is deep, and cannot be made to seem otherwise without cheating. Some elementary questions only have lengthy (honest) answers. Inertial motion is elementary. It isn't simple.
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