The Pendulum Clock
The thought of a large ball falling faster than a small ball was later challenged by Galileo himself, he believed i was all in the density f the object.
Galileo was taught Aristotelian physics at the University of Pisa. But he quickly began questioning this approach. Where Aristotle had taken a qualitative and verbal approach, Galileo developed a quantitative and mathematical approach. Where the Aristotelians argued that heavier bodies fell faster than lighter ones in the same medium, Galileo, early in his career, came to believe that the difference in speed depended on the densities of the bodies. Where Aristotelians maintained that in the absence of the resisting force of a medium a body would travel infinitely fast and that a vacuum was
therefore impossible, Galileo eventually came to believe that in vacuum all bodies would fall with the same speed, and that this speed was proportional to the time of fall.
therefore impossible, Galileo eventually came to believe that in vacuum all bodies would fall with the same speed, and that this speed was proportional to the time of fall.