Photo Album by Robert MacKay. The Movers in Physics Aristotle 384-322 BC Copernicus 1473-1543 (De Revolutionibus) Galileo (1564-1642) Newton (1642-1727)

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Presentation transcript:

Photo Album by Robert MacKay

The Movers in Physics Aristotle BC Copernicus (De Revolutionibus) Galileo ( ) Newton ( ) Einstein ( )

Law of inertia (Newtons1st Law) Every object continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it. acceleration = 0.0 unless the objected is acted on by unbalanced forces

200 N 800 N ? N

200 N 800 N 500 N

Same painter and plank (800N and 200N) ? N

Same painter and plank (800N and 200N) 830 N

Same painter and plank (800N and 200N) ? N

Same painter and plank (800N and 200N) 100 N

150 N

450 N

800 N 400 N