[syhprum]

Due to the Earth being spherical and not flat of infinite extent the path you take is elliptical not parabolic, not very different for long jumpers but you should keep it in mind if you are launching rockets.

[Bill S]

At about the age of 11, I had a cliff (about 300ft) at my disposal for a range of activities, including stone throwing. One thing I learned, quickly, was that throwing stones of similar weight from different heights made little, or no, observable difference to their horizontal travel.  I satisfied myself (practically) that I knew why, but paid no attention to the maths. 

Now, 66 years later, here are all the relevant figures.  Aint life surprisin’?