According to NASA, a rocket engine works by burning fuel and pushing the resulting hot gas out through an exhaust nozzle on the rear of the craft. Since every action has an equal and opposite reaction, as stated by Newto... More » Science Physics Motion & Mechanics

A water rocket works because of air pressure that is builds inside a container filled with water, usually a plastic soda bottle, which is released rapidly through an opening as it tries to escape. The reaction of a water... More »

Water bottle rockets work by pressurizing a plastic bottle with air and using that compressed air to force water out of the spout. The bottle works like a rocket engine, increasing the thrust provided by the pressurized ... More »

Simply put, rockets overcome the pull of gravity by moving very fast relative to the Earth. Although it is not strictly possible to entirely escape the gravitational pull of the Earth, as gravity propagates outward at th... More »

Fins provide stability to rockets and help them to face the right direction, maintain a straight trajectory and not spin uncontrollably. The fins make the rocket much more aerodynamic, allowing for smoother motion throug... More »

It is not difficult to change the rear or brakes on a car. The materials required include new brake pads, WD-40, all-purpose grease, brakleen, stands, a socket to screw the piston back into and Impact Driver, which can b... More » Science Physics Motion & Mechanics

A piston is a cylindrical plunger that moves within a metal cylinder through the four strokes of the engine cycle: intake, compression, power and exhaust. While their motion is predicated on other engine parts and the mi... More »