The Experiment
The Results
A pretty neat rocket, it fired up quite high. We were also able to keep re-using it, which added to the fun.
The Science
This, of course, is Newton's Third Law of Motion in action: commonly phrased as "for every action there is an equal and opposite reaction". Essentially the when the bung pops out, the compressed air trapped in the bottle is free to expand and forces the water out towards the ground, which in turn results in the rocket being propelled upwards.
