electric car continuation?

Question

There are very few perpetual motion machines out there, have you ever heard of the drinking bird, it goes up and down forever based on temperature variants, well anyway. I think that isay if there were 8 batteries in a certain car and it only needed 4 to run, while 4 would be fully charged and when the 4 in use got to a certain point say 25% than some sort of switch would then allow the fully charged batteries to be used, and in turn the other four would begin charging while the car drives and brakes. Wouldnt that make some more sense? It boggles my mind that with all the people that are way smarter than me who invent these things, that they cant make something that seems so simple. Maybe I am crazy but it just seems to easy to me.

Answer 1

Alas, taking energy from the car while it is moving will slow the car down, and stop it. In fact, this is exactly what regenerative braking does in an electric car.

Driving with generators running all the time would be like driving while applying the brakes at the same time. The energy you get back to charge the batteries will be less than the energy you used to accelerate the car, because of friction losses.

Another way to say it is that you can use the acceleration energy to move the car, or you can use the energy to charge the batteries. You can't do both at the same time very well.

There is a basic law of physics called the 'law of conservation of energy'. It says you can't make energy from nothing.

Answer 2

You are nieve. There is no such thing as a motor that will run forever and provide power to anything. It does ot wxist.

That bird you talk about will do this for a long time but is actually powered. These birds dip their beeks in water and pick up some of it. when it comes back up the water runs to the other side and helps the bird keep in motion.

Some of these so called machines that seem to never stop do run on elettricity and get it from light.

If you attach something to these devices that require energy then that device will have to produce more energy and this is not possible.

Answer 3

The drinking bird operates on the fact that the air is pretty much a constant temperature, which is because of drafts and the force of gravity. If you could stop the air moving, then the bird would stop drinking. The drinking bird is simply a renewable energy source, not a perpetual motion machine.

To do what your suggesting breaks the 1st law of thermodynamics, which basically states that you can't heat things up by putting them in the fridge.

Untill you can heat something up by putting it in cold surroundings, then you can't claim to have discovered perpetual motion.