Recent content by rocketstudent

I have got what you have told me down on the spreadsheet, now I am trying to find out formula for the ejection rate of the water, and also the velocity of the rocket, in order to gain a velocity time graph and then a force time graph.

Thank you Bill. I have been told that the differential equations involved cannot be solved analytically and hence why I have to model it. I do have some equation s to do with the mass loss rate and the acceleration however there are too many variables to solve it. RTW9 I will search tha term...

Ok thank you I have laid it out as you have said, couple of questions - what is the bottle mass, 0.02 step for? Water mass 1.7 - is this an arbitrary value that I can input or is it 1.7 for a reason? Why is the multiplier for eject rate 0.4? Also Acceleration values most likely will not be...

Excel I have experience with. I have been advised that I could use Mathematica although I do not have experience with this.

Ok thanks for your help. Unfortunately I haven't got a clue what that means as I don't have programming experience! I am not quite sure how to tackle it.

OK of course. Constants in the experiment are: The rocket is a 1.5 litre PET bottle. The pressure inside the rocket is pumped up to 40 PSI Variables: Mass of the water (fuel) - [kg] Force of the rocket - [N] (rocket is measured by a force sensor directed slightly above the rocket) Pressure...

I'm not quite sure what you're asking, if you are asking for a qualitative description I can give you that, and the variables it depends on, but the model has to be able to predict the force-time graph

Homework Statement I am trying to model a water rockets motion using a computer programme in order to compare it to my experimental data. I am studying physics at degree level but I have no knowledge of programming and am finding this particularly difficult. I have thought about using...