How Energy-Generating Sidewalks Work | WIRED

We walk here, We are walking there, we are walking everywhere. Maybe you’re going to work in a busy city or lunch. You are spending energy, and the practice is good for you. But what, if, above all, can we convert all the free energy and convert it to useful electricity?

This is a real thing. The system has been installed in dozens of countries. Watch this videoThe And why stop there? You can put them in discothek and jotes that are fancy steps to strengthen the straw lights. Or make them in the playground hopkoch grids. When you start thinking about it, the possibilities are endless.

But how does it work? And how much energy can it produce? Obviously a person cannot make a lot of difference, but convert Timing footpaths in New York and you can really have something. Can we put it around the world and stop using fossil fuels? Let’s look for!

Follow the bounceing ball

First we need a model of people walking. No sweat, isn’t it? Walking is so easy that 1 year old could do it. Okay, in fact, the bipidal locomotion is horribly complex from the physics point of view. Seriously, if you have to learn to walk from a physics model, you will still be in a stroller. So let’s get started with something simple: a bouncing ball.

Believe it or not, it’s a great good analogy. We immediately see that there are three types of energy involved: the energy of the speed, the potential power of gravitational and the possible force of spring.

Motion To do with the motion of an object – the faster it running, the more the energy energy. If you take a ball and throw it away, it will accelerate down, which means its speed strength is increasing. But where did that extra power come from?

Answer: It is stored in gravitational cases. This Gravitational powerThe The amount of field depends on the energy of the field (G = 9.8 Newton per kg on earth), the mass of the object and how high it is on the ground. As a ball is read, gravitational potential energy decreases and the speed of speed increases.

Just there you can see something very strong. We call it Storage of energyThe It says that if we have a system with a power input or output – which is called a closed system – the energy can change the form, the total amount of energy is fixed.

Finally, we have Possible power of springThe When it is compressed, it is the energy stored in an elastic object. When the ball hit the ground, it stops deformed. If you have a high-speed camera, you will see the speed of energy as the energy is converted into spring power.

Then the ball returns to get back to its size. The potential energy of the spring is converted back into motioning energy in the opposite direction, and the ball trampolines are turning the ward. Here to see it:

Animation: Rate Alline