RESEARCH

Cannons have been used since the early 1300's for attacks against the people. The cannon is used to defend territories and hurt people that are causing inflection on their country. There are thousands of different types of cannons that all have the same purpose. The cannon serves the purpose of hurting people and making people fear to come near their opponents territories. Cannons are used in many war situations and have been since the beginning of time. Cannons have been made out of many things such as metal, PVC pipes and tennis ball capsules. Over the time different types of cannons have developed and were not just used for war, they became a method of fun. People started to shoot potato's out of them and tennis balls to test how far they would go and they became like a form of shooting gun, to practice your aim. Cannons are now even being used in children toys, such as, transformers toys and disk release toys. The cannon has been changed from a harmful weapon to an enjoyable toy. For any cannon you need to make sure you have enough pressure built up for your cannon to shoot the object as far as possible. The volume of a cannon is also very important because it plays a major part with the pressure. The smaller your cannon, the greater the pressure build up becomes and the farther your object will travel.
Turnbull, Stephen . History of the cannons. January 30th, 2008, from The Walls of Constantinople AD 324–1453 (Fortress 25). Osprey Publishing, http://en.wikipedia.org/wiki/History_of_cannon.

Our Hypothesis is that the pressure will build up and, the pressure chamber inside of the tennis tube will push up and create a force going through the whole created inside of the tennis tube to cause a greater force and make the ball fly out at at increasing pressure and fly about seven feet.