Someone please explain this physics concept

AI Thread Summary
The discussion revolves around the behavior of a magnet dropped through a non-magnetized aluminum pole, which significantly slows its descent compared to a marker. Participants explore the physics behind this phenomenon, suggesting that the magnet may induce a magnetic field within the pole, affecting its fall. The difference in behavior when the magnet is stationary versus in motion is also highlighted, prompting further inquiry into magnetic braking effects. Suggestions to research magnetic brakes are offered as a way to deepen understanding. The conversation emphasizes the importance of exploring the underlying principles of magnetism and motion.
eddy10188
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My teacher had a long metal pole (I believe it was aluminum) and said that it was NOT magnetized. He put a magnet up to the side of the pole and it did not stick, and he dropped a marker through the top of the pole and the marker came out the bottom at a normal rate. However, when he took a magnet and dropped it through the top of the pole, it took a long time for it to come out, maybe 10 seconds. Then it just slipped out the bottom.

Some one please explain this phenomenon, thanks!
 
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Welcome to the PF.

Sounds like this may be part of your assignment, to figure out why there is a difference. What are your thoughts? Why would there be a difference between holding the magnet stationary against the non-ferrous metal, versus sliding it along next to the metal?
 
berkeman said:
Welcome to the PF.

Sounds like this may be part of your assignment, to figure out why there is a difference. What are your thoughts? Why would there be a difference between holding the magnet stationary against the non-ferrous metal, versus sliding it along next to the metal?

Oh sorry I should have explained..

The only thing I can really think of is that it that the magnet might be trying to set up a magnetic field inside of the pole. It also could be that the pole has a much smaller area for the magnet to go through so it is experiencing the effects of its own field but then again I am not sure that is true..
 
eddy10188 said:
Oh sorry I should have explained..

The only thing I can really think of is that it that the magnet might be trying to set up a magnetic field inside of the pole. It also could be that the pole has a much smaller area for the magnet to go through so it is experiencing the effects of its own field but then again I am not sure that is true..

Boy, it's hard to give a hint on this question without giving the answer away.

I'll try this, but it may still be too much. Use Google or Wikipedia.org to learn how magnetic brakes work...
 
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