[mod note: post moved into homework forum, so template is absent] G'day, I have an open ended investigation to do for school, and was wanting to do an experiment involving the motion of water from a hose, as this would give me a good parabolic curve to view. I wish to examine two independant variables. First one is angle of launch - pretty easy. I'm having trouble with a second one through. I was wondering whether i could change the pressure of the actual tap/ hose, and whether or not this has any correlation to initial velocity, as in can I work out the initial velocity if I measure the pressure of the tap using a pressure gauge, for example. Any help on the topic would be much appreciated. Cheers.