# Magnets?

Other Help — Page [1] 2
nectar
2010 Mar 8 • 232
hi guys, i was searching about the magnetic induction of Faraday and i was thinking of making a permanent spining CD with magnets, like something like this:

Explanation:
what i wanted is like to make a super simple design that if i put that magnet it will start repeling the others so the CD with magnets will spin forever without stoping :D.
I love cows and monkeys including cookies :D
 ≡ 2010 Nov 24 at 14:51 PST — Ed. 2010 Nov 24 at 14:52 PST
the_cloud_system
polly pushy pants

2008 Aug 1 • 3078
-6 ₧
thats cool
I drink to forget but I always remember.
 ≡ 2010 Nov 24 at 14:58 PST
Down Rodeo
Cap'n Moth of the Firehouse

2007 Oct 19 • 5486
57,583 ₧
Unless you have a frictionless system, it won't rotate forever (just a very long time if you do it well).
 ≡ 2010 Nov 24 at 15:20 PST
Rockbomb
Dog fucker (but in a good way now)

2009 Nov 13 • 2045
Also won't the magnet demagnetize each other if you keep them in each others presence?
 ≡ 2010 Nov 24 at 15:23 PST
Down Rodeo
Cap'n Moth of the Firehouse

2007 Oct 19 • 5486
57,583 ₧
Eh, maybe. I think we're assuming they're permanent.
 ≡ 2010 Nov 24 at 16:09 PST
phoenix_r

2009 May 13 • 905
17 ₧
Perpetual motion?!

¡Science!
BOO
 ≡ 2010 Dec 7 at 18:36 PST
eDan Co.
Mighty Typist

2007 Sep 24 • 2921
252 ₧
If you put this device in a frictionless vacuum, the sum of forces applied to the disc will be 0. Look at your diagram: the magnet at 3 o'clock is doing nothing, the magnet at 1 o'clock is pushing CCW at a force of F(N), and the magnet at 5 o'clock is pulling CW at a force of F(N), etc etc etc with all magnets.

Basically the magnets do nothing. Maybe add mass to the disc, but nothing more.
May contain traces of invisible text.
 ≡ 2010 Dec 7 at 19:04 PST
SRAW
Rocket Man

2007 Nov 6 • 2525
601 ₧
Mythbusters have proven that perpectual motion machines can't exist.
 ≡ 2010 Dec 7 at 19:09 PST
Down Rodeo
Cap'n Moth of the Firehouse

2007 Oct 19 • 5486
57,583 ₧
I'm not sure that that's provable. On the other hand perpetual motion violates lots of different laws of physics.

Your machine wouldn't produce motion. It could store it rather inefficiently, but where's the point in that?

It would be instructive to look at your setup and one that is the same except with the magnets removed. The balance of forces will be the same (as Edan said, zero).

And, of course, if you used it to induct a current it would slow down. It's odd but you can view it as a kind of friction: the electrons individually can be pushed around but when there's lots it can be a surprising force. If you have a hand generator you can feel the difference by hooking up lights of different wattages.

I like how I've said the same thing over and over in this thread in marginally different ways.
 ≡ 2010 Dec 7 at 19:14 PST — Ed. 2010 Dec 7 at 19:16 PST
eDan Co.
Mighty Typist

2007 Sep 24 • 2921
252 ₧
SRAW said:
Mythbusters have proven that perpectual motion machines can't exist.

Physicists knew that all along. Mythbusters showed it on TV, explaining it like you would to an eight-year-old.
May contain traces of invisible text.
 ≡ 2010 Dec 7 at 19:16 PST
SRAW
Rocket Man

2007 Nov 6 • 2525
601 ₧
I don't like how this jewish atheist thinks I didn't know that.
 ≡ 2010 Dec 7 at 19:18 PST
aaronjer

2005 Mar 21 • 4854
1,227 ₧
SRAW, most people here are going to assume the worst of you regardless of the context. It is an unfortunate side-effect of being disliked. Regardless... he only implied that you didn't already know that.

In general and out of this context: What's up with people thinking less of someone's abilities just because they don't like them? Almost everyone does that. It's stupid. People are stupid.
 ≡ 2010 Dec 7 at 19:51 PST
SuperJer
Websiteman

2005 Mar 20 • 6495
nectar: Is there any particular reason why the arrows in your diagram go counter-clockwise?

Couldn't they just as well go clockwise?
 ≡ 2010 Dec 7 at 22:54 PST
eDan Co.
Mighty Typist

2007 Sep 24 • 2921
252 ₧
aaronjer said:
People are stupid.

With an average IQ of 100, yes, they are.
May contain traces of invisible text.
 ≡ 2010 Dec 8 at 02:08 PST
Mate de Vita
Kelli

2008 Oct 4 • 2453
159 ₧
aaronjer said:
In general and out of this context: What's up with people thinking less of someone's abilities just because they don't like them? Almost everyone does that. It's stupid. People are stupid.

You're judging this shit the wrong way. People don't like other people whose abilities they think less of.
...and that's the bottom line because Mate de Vita said so.
 ≡ 2010 Dec 9 at 08:17 PST
aaronjer

2005 Mar 21 • 4854
1,227 ₧
That'd just be mean. There are plenty of incompetent people I don't mind.
 ≡ 2010 Dec 9 at 18:20 PST
Kelli

2010 Jan 27 • 24
It's true. AaronJer has played Civilization with me. On multiple occasions, at that. That's tolerance.
 ≡ 2010 Dec 10 at 01:19 PST
Mate de Vita
Kelli

2008 Oct 4 • 2453
159 ₧
Kelli said:
It's true. AaronJer has played Civilization with me. On multiple occasions, at that. That's tolerance.

Yeah, but you are aaronjer, so it doesn't count.
...and that's the bottom line because Mate de Vita said so.
 ≡ 2010 Dec 10 at 11:43 PST — Ed. 2010 Dec 10 at 11:43 PST
phoenix_r

2009 May 13 • 905
17 ₧
Mate de Vita said:
Kelli said:
It's true. AaronJer has played Civilization with me. On multiple occasions, at that. That's tolerance.

Yeah, but you are aaronjer, so it doesn't count.

Who isn't, these days?
BOO
 ≡ 2010 Dec 10 at 12:30 PST
Mate de Vita
Kelli

2008 Oct 4 • 2453
159 ₧
phoenix_r said:
Mate de Vita said:
Kelli said:
It's true. AaronJer has played Civilization with me. On multiple occasions, at that. That's tolerance.

Yeah, but you are aaronjer, so it doesn't count.

Who isn't, these days?

I think aaronjer is defined as anyone other than himself.

So anyone who isn't aaronjer is in fact aaronjer.
...and that's the bottom line because Mate de Vita said so.
 ≡ 2010 Dec 10 at 13:19 PST
phoenix_r

2009 May 13 • 905
17 ₧
Mate de Vita said:
I think aaronjer is defined as anyone other than himself.

So anyone who isn't aaronjer is in fact aaronjer.

1. !ato->ato
2. ato->!ato
3. goto 1
BOO
 ≡ 2010 Dec 10 at 14:45 PST
aaronjer

2005 Mar 21 • 4854
1,227 ₧
No, it's not a paradox, it's just wrong. We've been over this!

But seriously. Trying to get Kelli to attack an enemy city with more than one unit at a time? Impossible. At least it's impossible without a complex system of puppetry to control every movement from afar.

And you'd better show up at Outback tonight! With your car that you may or may not be old enough to drive. I can't remember how old you are.
 ≡ 2010 Dec 10 at 18:41 PST — Ed. 2010 Dec 10 at 18:45 PST
NatureJay
SJA: Commander of Ruthless Abuse

2005 Mar 22 • 1871
574 ₧
How the fuck did this post last two weeks without an ICP reference?
100% natural, no antibiotics, and bloodgrass-fed
 ≡ 2010 Dec 10 at 19:01 PST
Rockbomb
Dog fucker (but in a good way now)

2009 Nov 13 • 2045
NatureJay said:
How the fuck did this post last two weeks without an ICP reference?

I was wondering the same thing, I've been waiting for it.
 ≡ 2010 Dec 10 at 19:33 PST
the_cloud_system
polly pushy pants

2008 Aug 1 • 3078
-6 ₧
I drink to forget but I always remember.
 ≡ 2010 Dec 10 at 20:47 PST
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