Water Rocket

About Water Rocket:

A water rocket is a type of model rocket using water as its reaction mass. Such a rocket is typically made from a used plastic soft drink bottle. The water is forced out by a pressurized gas, typically compressed air. Like all rocket engines, it operates on the principle of Newton’s third law of motion.

Working Principle:

A water rocket uses air pressure combined with water to launch high into the air. The rocket is partially filled with water and then pressurized with air. The air is pumped into the rocket from the bottom. As the air is pumped in it floats through the water and into the empty space above the water. The space above the water then becomes pressurized, and stores energy, much like a spring stores energy when you compress it. Once the air pressure becomes high enough the rocket releases from its launch base, and the water shoots out of the rocket base and causes the rocket to fly straight up at high speed.

Image Credit: Physics Stack Exchange

List of material required:

Material Qty
2L Bottles
PVC Small Pipe Piece 5
Tee Joint 3
End Caps 3
Coupler 1
PVC Pipe Long 2
Band Clamp 1
PVC Glue 2
String 1
Zip Ties 6
Tape 1
Scissors 1
Black Sketch Pen 1
Cycle Pump 1

Follow the link to build your own water rocket:

http://www.youtube.com/watch?v=FV2nrifqzX0

 http://www.youtube.com/watch?v=Wqo2U62GB-k

Reference:

http://www.real-world-physics-problems.com/water-rocket.html

https://en.wikipedia.org/wiki/Water_rocket

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