How can energy -generated sidewalks work Wireless

We are going here, We walk there, walk everywhere. You may go to work or lunch in a crowded city. You spend energy, and exercise is useful for you. But what if, moreover, we can restore everything that energy provided freely and convert it into useable electricity?

This is a real thing. The systems were installed in dozens of countries. Check this video. And why do you stop there? You can put it in discs and harness this work that is illusual to operate strong lights. Or build it on Hopcotch stadium. When you start thinking about it, the possibilities are endless.

But how does it work? How much energy you can generate? It is clear that one person will not make a big difference, but it turns the fanatic sidewalks in New York and you may have something. Can we put this around the world and stop using fossil fuels? Let’s discover!

Follow the counted ball

First, we need a model for a person walking. No race, right? It is very easy to walk one child. Well, in fact, the complex bilateral movement is terribly complex from the perspective of physics. Seriously, if you have to learn to walk from the physics model, you will remain in a vehicle. So let’s start with something simpler: a lie ball.

Believe it or not, this is a good likeness. We can immediately see that there are three types of energy concerned: kinetic energy, potential energy and potential spring energy.

Kinetic energy It relates to the movement of an object – the faster it moves, the more the kinetic energy. If you take a ball and drop it, it will accelerate down, which means that its kinetic energy is increasing. But where did this additional energy come from?

Answer: It is stored in the field of gravity. This is it Current gravity energy. The amount depends on the strength of the field (Z = 9.8 Newtons per kilogram on the ground), the object mass, and the extent of its height over the ground. As the ball drops, the potential gravity energy decreases and the kinetic energy increases.

There you can see something very strong. We call it Power maintenance. This says that if we have a system without inputs or energy outputs – what is called a closed system – can change energy, but the total amount of energy is still fixed.

Finally, we have Possible spring energy. This is the energy stored in a flexible object when it is pressed. When the ball hits the ground, it is distorted and stopped. If you have a high -speed camera, you will see that it is flat for a second as the kinetic energy is converted into spring energy.

Then the ball returns to restore its shape. Possible spring energy is converted into kinetic energy in the opposite direction and the ball trampoline up. This is what it seems:

Animation: Rheett allain