posted by Julia on .
What equation should I used for a water bottle rocket lab?
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?
According to a Wiki article, the formula for the instantaneous thrust is
At=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.