19_Galileo_Newton - Lesson 19: Galileo & Newton Before...

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Before we really start looking at dynamics ( the study of forces ) in depth, it would be wise to learn a little something about the two people that contributed the most to this branch of physics: Galileo Galilei Sir Isaac Newton Galileo Galilei Born in Pisa, Italy on February 15, 1564, died in Arcetri, Italy, January 8, 1642. First studied medicine in 1581 at the insistence of his parents. Today he is remembered mostly for his work in astronomy, mathematics, and physics. He carefully constructed experiments to reduce error and ensure true observations, unlike many other "scientists" at that time. Galileo showed that falling bodies do not have velocities proportional to their weights. According to Aristotle , heavier objects fall faster because gravity pulls on them more. Drop a book and a piece of paper at the same time and you’ll see what Aristotle was talking about! Galileo contradicted Aristotle, saying that air resistance is to blame, not gravity. To prove this he ( supposedly ) climbed to the top of the Leaning Tower of Pisa and dropped two objects, one made of metal, the other of wood. According to Aristotle's theory, the heavier metal weight should have hit the ground first. In fact, both hit at the same time… gravity without air resistance) acts the same on
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19_Galileo_Newton - Lesson 19: Galileo & Newton Before...

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