A sample of this motor:
[https://www.youtube.com/watch?v=LXBYMiNH1nE](https://www.youtube.com/watch?v=LXBYMiNH1nE)
In: 87
How do you, say, throw a ball?
You hold the ball in your hand, and then you swing your arm, and THEN you RELEASE. If you don’t release the ball, all the energy you use to swing is wasted, and you start from the beginning, with a ball in your hand.
An electrical motor (most conventional ones) use pairs of electromagnets to move the moving parts a.k.a Rotor. The idea is, you power the closest magnet first to pull the rotor towards it. At certain point, the motor will switch off (or release) this pair, and power up the next pair. And the cycle of powering on a pair and then switching to the next continues to keep the motor moving.
This is the reason motors use electromagnets, magnets that can be turned on and off with electricity. A permanent magnet cannot turn on and off on command like that, so you end up swinging but not releasing the ball, which is useless.
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