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September 2, 2014

September 2, 2014

Posted by **Julia** on Tuesday, August 31, 2010 at 6:20am.

I am using distance vs volume of water. Of course, the volume of water is my independent variable. What equation should I use for this lab?

- physics -
**MathMate**, Tuesday, August 31, 2010 at 9:09amAccording to a Wiki article, the formula for the instantaneous thrust is

F=2PA_{t}

where

F=thrust

P=pressure

A_{t}=area of the nozzle

Obviously the mass changes with time as well as the pressure. So both F, mass and P are functions of time, and you will need to integrate the resulting acceleration over time to get the distance.

Do read through the safety precautions before attempting this lab.

Ref:

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

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