In daily life, people often put in the side of the refrigerator some cute little thing to modify them.
We all know, these small objects can be attached to because it has a magnet on the fridge.
According to our experience, in the absence of any intervention, the magnet can be attached in the side of the refrigerator for a long time, or even lost for decades.
Then came the question.
The side of the magnets in the refrigerator.
The earth's gravity pulls it.
Therefore, magnets must have to overcome the gravity of the energy.
Then its power where it came from, let's first analysis the stress of magnets.
When attached with a flanking the fridge magnets, it in the stationary state.
According to Newton's first law of motion, static state object is zero outside.
Through the simple analysis, we may safely draw the conclusion that, in this state, magnets are four force, the electromagnetic force between the magnet and refrigerator side (
This is two forces)
, electromagnetic force and lateral friction freezer, make this four force opposite to each other, balance each other, so that the magnet is static.
Therefore, we may draw a conclusion that 'adsorption in the refrigerator magnet side and decades won't drop phenomenon' is a kind of force balance phenomenon, this has led to this reason.
At the end of the day, is the result of competition between gravity and electromagnetic force, so the magnet electromagnetism come from?
Here, let's talk about a simple science.