SCI 104 Lecture Notes - Lecture 2: Kilogram, Scientific Control
2 Nov 2017
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Big ideas for you to understand today: aristotle on motion, galileo"s concept of inertia, mass---- a measure of inertia, net force. Burl the painter has a weight of 600 n, and carries a 100-n bucket of paint. Aristotle on motion: aristotle classified motion into two kinds: Natural motion- motion that is straight up or straight down. Heavy objects fall faster than lighter objects. Objects seek their natural resting places: violent motion- imposed motion resulting from an external push or pull. Moving objects must necessarily have forces exerted on them to keep them moving. Italian scientist galileo demolished aristotle"s assertions in early 1500s. In the absence of a force, objects once set in motion tend to continue moving indefinitely: legend of the leaning tower of pisa. Galileo showed that dropped objects fall to the ground at the same time when air resistance is negligible. Differs from aristotle because galileo was able to acknowledge air resistance.
