Question

The Quest For Perpetual Motion It has been a tenet of physics that it is not possible to build a perpetual motion machine in a closed or isolated system. This fact has not stopped people from claiming to build such a machine. Explain why a perpetual motion machine violates the principles of thermodynamics. Do some research and provide an example of a supposed perpetual motion machine. Explain the machine in detail and why it does not exhibit perpetual motion.

Answer 1

Perpetual motion machines of the first kind violate the First Law of Thermodynamics. They produce mechanical work (without any energy being input; this violates the principle of the conservation of energy.

Perpetual motion machines of the second kind violate the Second Law of Thermodynamics. They convert thermal energy directly into mechanical work, with no heat being rejected this violates the rule of the production of entropy, that entropy in a system must always increase.

1.Overbalanced wheel

Moving weights are attached to a wheel in such a way that they fall to a position further from the wheel's center for one half of the wheel's rotation, and closer to the center for the other half. Since weights further from the center apply a greater torque, it was thought that the wheel would rotate for ever. However, since the side with weights further from the center has fewer weights than the other side, at that moment, the torque is balanced and perpetual movement is not achieved also friction is present at axel.

2.

The float belt

Idea is that foaters would rise through the liquid and turn the belt. However, pushing the floaters into the water at the bottom takes as much energy as the floating generates, and some energy is dissipated.since there is loss of energy it cannot be pmm.