# AP PHYSICS Bottle Rocket Lab - Bottle Rocket Lab Lily Tran...

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Bottle Rocket LabLily TranMadison Ives, Jaela Stith, John Taylor30 October 2015AbstractThe objective of this experiment was to construct a well-made bottle rocket that would travel thefarthest distance/highest height when launched. Using two 2-liter bottles and other materials suchas tape and cardboard, a bottle rocket was built. The bottle rocket would be placed on a launchpad with 1 liter of water as fuel and released at 40 psi. Due to a source of leaking found on thebottle rocket, the rocket was unable to be launch.
BackgroundThe purpose of this experiment was to construct a bottle rocket that would travel the farthestdistance when launched into the air. When constructing the bottle rocket two 2-liter bottles wereused, and the “Bertha series” nose cone was cut out and placed at the top of the rocket. This nosecone is made by cutting the bottom of a 2-liter bottle and attaching the top part on the actualrocket. Furthermore, the fins on the rocket guide the rocket when it is launched; without the fins,the rocket would have no guidance and tumble when released. In this experiment, four fins madeout of cardboard material were placed on the lower portion of the rocket by using duct tape. Thisdesign also included a parachute system that was located inside of the “Bertha series” nose cone.The parachute was made by cutting a garbage bag into a circular shape and tying eight strings onit to attach it to the top of the rocket. Relevant formulas that are involved in the experiment are:F=ma(1)Vy2=Voy2+2ayy(2)Vx2=Vox2+2axx(3)x=xo+Vot+12at2(4)Fd=12CρA v2(5)
MoMfln¿¿∆V=Vo¿(6)Pe=mgh(7)Ke=12m v2(8)W=F ∙d(9)P=Wt(10)Continuing on, this lab also serves to introduce Newton’s Three Laws of Motion: law of inertia,force (“F”) equals mass (“m”) times acceleration (“a”), and for every action there is an equal butopposite in direction reaction. These laws apply to the experiment because an unbalanced forcemust be created to change a rocket’s speed, the amount of force being generated is determined bymass of in this case the water released, and the motion or reaction to the force being producedmust be equal to and in the opposite direction of the thrust. Projectile motion would also beinvolved in this experiment because the rocket would move in both the vertical and horizontaldirection when launched. In order to solve for the vertical and horizontal components, Equation