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Modern Science

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Aristotle 384 – 322 BC Foremost scientist of ancient Greeks “Natural for a horse to be horse like.” Natural for light things to rise – like a puff of smoke Heavy things – to fall The heavier the faster He never...

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Measurement The Protractor Tycho Brahe 1546 –1601 Accuracy to one minute of arc 1/60 degree = 1 nautical mile sextant

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Galileo Galilei 1564 –1642 Aristotle had said heavier objects fall faster Galileo - All objects fall with the same constant acceleration. The change in velocity is proportional to the elapsed time. Δv ~ Δt v 2 − v 1 ~ time elapsed

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Acceleration Acceleration – How quickly the velocity changes a = Δv / t = (v 2 -v 1 )/t Velocity – How quickly the position changes v = s/t = Δx/t = (x 2 -x 1 )/t

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