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jaredvert
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To each other? Repondez!
jaredvert said:Yes but I know of no equation for potential energy between magnets.
Ok so here is something I don't understand. I've had electricity and magnetism course but I never learned of any such thingn. Why not? Is this stuff told of later on?UltrafastPED said:See http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magpot.html
And here is a lab for you to do: http://physics.bu.edu/ulab/intro1/magnetic.pdf
You'll have to ask the people who taught the courses.Ok so here is something I don't understand. I've had electricity and magnetism course but I never learned of any such thingn. Why not?
I suspect you will already have learned the law of conservation of energy, and the definition of potential energy.Is this stuff told of later on?
... that does not answer the question I asked: what is the definition of potential energy?Yes but I know of no equation for potential energy between magnets.
Unfortunately I am not sure how to calculate the force between two magnets, only between mag fields and wiresSimon Bridge said:You'll have to ask the people who taught the courses.
What level was the course taught at?I suspect you will already have learned the law of conservation of energy, and the definition of potential energy.
Your course on magnetism should also have taught you about magnetic forces. If those bits are there, you should have been able to figure it out.
... that does not answer the question I asked: what is the definition of potential energy?
You should have learned that the potential energy of a system is the amount of work needed to get it into that configuration.
You should have equations for the force between two magnets, and an equation for work, and so on.
The course may not have covered magnetic potential energy because the fundamentals had already been taught. After all, how much time will you have for the exam?
Yeah I mean I was sure there was a pot energy between them but I didn't know the force between them so I couldn't calculate the pot energy between them. Are these equations created empirically?Simon Bridge said:It's similar - permanent magnets are more complicated than bits of wire.
You are learning the situations for simple geometries so the maths is easier.
i.e. if you have two bar magnets length L which are separated by a distance D>>L, then you can use the magnetic dipole equation.
http://en.wikipedia.org/wiki/Force_between_magnets
But you can easily tell that there must be a "magnetic potential energy" because you have to do work to push two like poles close to each other. You can get two magnets and measure it.
Also I've read the whole giancoli physics based on calc 3 and I've never run into forces between permanent magnets.Simon Bridge said:It's similar - permanent magnets are more complicated than bits of wire.
You are learning the situations for simple geometries so the maths is easier.
i.e. if you have two bar magnets length L which are separated by a distance D>>L, then you can use the magnetic dipole equation.
http://en.wikipedia.org/wiki/Force_between_magnets
But you can easily tell that there must be a "magnetic potential energy" because you have to do work to push two like poles close to each other. You can get two magnets and measure it.
That is usually the easiest way to do it in practice - but you can make approximations for simple geometries.jaredvert said:Yeah I mean I was sure there was a pot energy between them but I didn't know the force between them so I couldn't calculate the pot energy between them. Are these equations created empirically?
You wouldn't - even though you have probably handled permanent magnets as part of practical demonstrations. At that level, and well into college, permanent magnets are mostly treated qualitatively.jaredvert said:Also I've read the whole giancoli physics based on calc 3 and I've never run into forces between permanent magnets.
Yes, the potential energy between two magnets is inversely proportional to the distance between them. As the distance increases, the potential energy decreases.
The strength of the magnets does not directly affect their potential energy. However, stronger magnets may have a greater force of attraction or repulsion, which can affect the potential energy between them.
Yes, two magnets with the same polarity can still have potential energy. This is because they will repel each other, and this repulsive force creates potential energy between them.
No, potential energy and kinetic energy are two different forms of energy. Potential energy is the energy an object has due to its position or configuration, while kinetic energy is the energy an object has due to its motion.
The potential energy between two magnets can be calculated using the formula U = -G(m1m2)/r, where U is the potential energy, G is the gravitational constant, m1 and m2 are the masses of the two magnets, and r is the distance between them. This formula is similar to the formula for calculating potential energy between two masses in the gravitational field.