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That device keeps constant the sum of energy: sds66.png (105.75 kB . 1163x568 - viewed 4303 times)And that device not: gt85.png (118.88 kB . 1187x621 - viewed 4317 times)Where is the mistake ?
@Thebox: yes, it is an example to break the law of conservation of the energy in a closed device could be not constant. It is theoretical and not very useful in practice. What I need to explain ?
The function used is a gradient of pressure in a "fluid" like gravity can do with water, but I use theoretical spheres (not molecules) without mass and without friction, like that the calculations are very easy. To have a gradient, I use theoretical springs. One spring for each sphere. I take the force of the spring constant (don't depend of the length). Why I can't use gravity and water ? because I need to change the orientation of the attraction.What's more ?
Simplifications: No mass
Here, it is not a pendulum, because the device is deformed from 45° to 90°, it is not a cycle. I study the sum of energy from 45° to 90°. I loop the gif to see how the device is deformed, but the start is at 45° and the end is at 90°.