Extended data
Magnetic motive is mainly composed of a large bar magnet and a plurality of small magnets around it, and the small magnets compress springs to move along their respective axes. The small magnets around are repelled by the magnetic force of the big magnet in the middle, pushing the compression spring, and the small magnet on the right is far away from the rotating shaft under the repulsion force (the material has an ultra-smooth surface), and the gravity moments on the left and right sides are unbalanced, thus driving the whole wheel to rotate clockwise. The dreamer thinks that the whole process does not consume any energy, which is called magnetic perpetual motion machine. We think this imaginary machine belongs to the "perpetual motion machine of the first kind".
distort
1, the dreamer tried to use gravity as the driving force, but did not consider the influence of gravity on the small magnet, and the position of the small magnet would not be symmetrical under the action of gravity.
2. By calculating the torque of the system, it shows that when M = 0, the wheel stops at a certain position and will not continue to move.
3. According to the first law of thermodynamics Q = △E+A, part of the heat absorbed by the system is converted into internal energy of the system, and part of it is converted into external work of the system. During the whole imaginary movement, the magnet repels and pushes the compression spring, which consumes energy and releases energy when the spring recovers. The center of gravity of the system remains unchanged, gravity does not do work, and the total mass becomes △E = 0. If Q is not absorbed externally, then (A = 0) cannot do work externally. So this device can't move permanently to do external work.
References:
Baidu encyclopedia-magnetic perpetual motion machine