For a number of centuries, many inventors have tried to build a machine that would do useful work without consuming any energy from outside. In other words, they sought to create energy out of nothing. Such a fantastic car was called a perpetual motion machine, or perpetual motion mobile, which means perpetual motion. Nowadays, although rare, there are still misguided inventors of the perpetual motion machine. What is the result of the hard work of a huge number of inventors who, with such persistence, have sought to create a perpetual motion machine for many centuries? Did the inventors work in vain? Is it possible to invent a perpetual motion machine? We will tell about this in our book.