I have searched and searched. I cannot find any record of Isaac Newton performing experiments in mechanics that would have proven his proposed mathematical relations between force, mass, time, and velocity to be true. As far as I have found, Isaac Newton did perform experiments in optics, but not in mechanics. If this is true, then Isaac Newton cannot be credited with being a physicist in the area of mechanics. I think it should be said that Isaac Newton was a great mathematician and a theoretical physicist, but not a great physicist in the area of mechanics. Have we mislabeled Issac Newton by hailing him as one of the world's first great physicists? Should we be instead saying that he was a mathematician who, by chance, used his intuition (which we all have) to create a mathematical model of physical interactions that happens to be correct?