Magnetic plate eddy current braking effect on a copper disc

[Gyro de Pyro]

Hi, I've seen many videos of neodymium magnets sliding slowly down an inclined copper plate, or slowly down a copper tube - due to eddy current braking,but never the other way around. My question is; will a copper disc sliding down an inclined magnetic plate, or down a magnetic tube act in the same way? Leading to; how small a particle of copper can be slowed by eddy current braking in sliding down the magnetic plate? Thanks.

 

[anorlunda]

The braking effect should be reciprocal. All motion is relative in any case.

But eddy currents require some depth to be significant. A thin foil would not be an effective eddy current brake. So the same applies to particles; the braking force reduces when the diameter is small. The braking effect also reduces with the distance between the metals, so a disk placed flat will be more powerful than the same mass shaped as a sphere.

If you want more detail than that, you must be more specific in your question.