ELA Component

There is air pressure, but we don’t notice it. Why? Because the air is all around us. All things being equal, air particles will disperse evenly in an area so that there is equal air density at every point. Without any other forces at work, this translates to the same air pressure at all points. We aren't pushed around by this pressure because the forces on all sides of us balance one another out. Even if we don’t push by air, some objects can have the pressure, moreover, it turns into energy.

Before mentioning our ‘balloon powered car’ project, I want to talk about one of my memories. Two years ago, in the summer, my family and I went to Mexico, Cancun. My father, little brother and I take a tour on parachute shipping. The parachute was affecting by the air pressure. If there were no air resistance, then gravity would cause everything to fall at the same rate, so no matter what item you dropped, it would hit the ground at exactly the same time. But air resistance complicates things and makes sky-diving a lot more fun. Air resistance happens because as things fall, they have to push their way past the atoms and molecules that make up the air in order to get where they’re going. The difference of the parachute shipping and our project is a source of movement; our project creates movement on the car, but on the parachute shipping the factor that makes the movement is motor.

In our project, Balloon Powered Car, we observed that our car was not going straight. It was because the wheels were not parallel to each other and there was friction on the ground. First, we fixed the wheels and then we tested our project on marble. The physical explanation is; when we inflated the balloon, it stored potential energy and when we released it, the energy converted to kinetic energy, the energy of motion, as the ballon zooms around the room. Some of the energy converted to heat on our first car because of the friction. In the end, we understood that; energy never disappears.

Another issue is that there are different air powered vehicles, which produced by Robert Hardie and Hoedley- Knight- this issue will be covered more on the SS component.