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Bottle Rocket Lab Report

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sophie tiahnybik

on 13 November 2013

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Transcript of Bottle Rocket Lab Report

Bottle Rocket Lab Report
Introduction
For this lab we made rockets from two liter soda bottles. Our goal was to make them efficient enough to go one hundred meters, and reach the fence of the soccer field. In trying to reach this goal, we had much success in trying to go over the fence and had at least 2 or 3 rockets go over the fence in each class.
Variables
independent variable: mass and length, these are the things that changed in the experiment.
dependent variable: distance, this is what did not change through out the experiment.
Constants
the soccer field, the pressure (90PSI), the amount of water, launch pad, and launch angle.
Hypothesis
I hypothesize that the longer and the more dense the rocket it is, the more distance it will have. Due to kinetic and potential energy. This hypothesis was proved to be wrong when we launched some of the smaller and lighter rockets and they traveled a greater distance than the longer and more dense rockets.
Controlled Experiment
A controlled experiment is where every variable is controlled so every outcome could be the same. In this lab I believe that the lab was not a controlled experiment due to the weather, the different duck tape that was used, and the type of bottles that were used. The way we could make this a controlled experiment would be to; do all the rocket launches on the same day, at about the same time. Also to designate a certain type of duck tape and bottles that should be used.
Data Tables
In my tables I decided to show mass and length. I chose those two because I believe that will the show the ways my hypothesis was incorrect.
Analysis
My original hypothesis stated "I hypothesize that the longer and the more dense the rocket it is, the more distance it will have. Due to kinetic and potential energy. This hypothesis was proved to be wrong when we launched some of the smaller and lighter rockets and they traveled a greater distance than the longer and more dense rockets." This hypothesis rejected when when a rocket that was 208.30 grams and 48.00 centimeters flew for 8 seconds, and went 100 meters. This rocket was one of the few rockets that flew for that long and most other rockets that weighed more, and were longer could only fly for about 3 seconds. The weather and some other variables may have been played into this lab and may have effected some of the rockets success.
Conclusion
As was stated before, my hypothesis was incorrect. It turned out to be the opposite of what I hypothesized, the rocket needs to be shorter and less mass. The longer and heavier rockets could only fly for about 3 seconds, but the shorter rockets could fly on average for 7 to 8 seconds. For example a rocket that weighed 221 grams and had a length of 51 centimeters only flew for 1.6 seconds. Also a rocket that was 208.30 grams and had a length of 48 centimeters flew for 8 seconds. This shows that the shorter rocket can endure a longer flight better than a longer, more dense rocket. Behind this data I believe that my hypothesis was proved wrong in the lab, and a shorter, lighter rocket would be better for launching.
Sophie Tiahnybik
References
https://docs.google.com/a/arrowheadschools.org/document/d/1iDuT18-gRrxpb6NjEoxmJl1dGmKvWipUKlvhcbMNvc4/edit
https://docs.google.com/a/arrowheadschools.org/document/d/1iDuT18-gRrxpb6NjEoxmJl1dGmKvWipUKlvhcbMNvc4/edit
https://docs.google.com/a/arrowheadschools.org/document/d/1iDuT18-gRrxpb6NjEoxmJl1dGmKvWipUKlvhcbMNvc4/edit
https://docs.google.com/a/arrowheadschools.org/document/d/1iDuT18-gRrxpb6NjEoxmJl1dGmKvWipUKlvhcbMNvc4/edit
Full transcript