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Physics
Classical Physics
Mechanics
Rotation is absolute, linear motion is relative?
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[QUOTE="A.T., post: 6841697, member: 85613"] Yes if the water is at rest in the rotating frame, it has some angular momentum around the center of the bucket. You can (but don't have to) decompose the inertial forces like that. But the effect of the circular translation is not a parabolid shape, because the inerial froce field from the centripetal acceleration is uniform. It's a choice of reference frame origin: A) In the co-rotating frame with origin at the center of the room, you have the following inertial forces: - Centrifugal force radially away from the room-center (due to rotation of the reference frame axes) B) In the co-rotating frame with origin at the center of the bucket, you have the following inertial forces: - Centrifugal force radially away from the bucket-center (due to rotation of the reference frame axes) - Uniform inertial force parallel to the line connecting the room-center and the bucket-center (due to non-inertial translation of the frame origin) The sum of the two fields in B must equal the centrifugal force in A. In both frames the water is at rest, so there are no Coriolis forces. [/QUOTE]
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Physics
Classical Physics
Mechanics
Rotation is absolute, linear motion is relative?
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