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Cross Reference
Galileo: Galilei: (1564-1642):
" I liked what Galileo had been doing with his force diagrams even though they did turn out to be inadequate because he did it on a plane instead of omnidirectionally. But it was good thinking that things did run into each other and there were a resultant of forces. You could prove things on the billiard table showing that Avogadro was right. So there were lengths of vectors that were lengths of vectors that were proportional to the mass times the velocity and there were unique directions in Universe."
