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J. Perelman
"Entertaining physics". Book 1.
Chapter 4. Rotation. "Perpetual motion machines"

EVEN “PERPETUAL MOTION MACHINES”

In the picture you see a heavy chain thrown over the wheel so that the right half of it at any position must be longer than the left. Hence, " said the inventor, it should outweigh ever to fall down, resulting in movement of the entire mechanism.


Eternal is this engine?

Is this true?

Of course, no. We now sawthat the heavy chain can be balanced light, if the forces pull them away from different angles. In this mechanism the left chain is stretched vertically, the right is inclined, and therefore, although heavier, is still not peretyagivaet left. Expected “eternal” movement here to get can't.

Perhaps all funny have received an inventor “eternal” of the engine, showing my invention in the sixties of the last century at the Paris exhibition. The engine consisted of a large wheel with moving balls in it, and the inventor claimed that no one would be able to delay the movement of the wheel. Visitors one after the other tried to stop the wheel, but it was immediately renewed the rotation, as he took his hands. No one guessed that the wheel rotates thanks to the efforts of the visitors to stop him, pushing him back, they wound up the spring artfully hidden mechanism...

Entertaining physics J. Perelman

 




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