1. And his bloody laws And you
Newton
And his bloody laws
And you

2. A bit of history here: The great and all powerful Aristotle
The natural state of an object is at rest
Large objects “want” to be at rest more
Book and paper demos

3. Galileo The natural state of an object is
What ever it is doing at that moment

4. Newton’s 1st Law:
An object in motion, remains in motion, unless acted on by an external force.
Demo: Student on hover craft

5. Newton’s 2nd Law: The sum of all forces on an object =
Mass x acceleration
ΣF = ma
Demo: apply same force to carts w/ students of different masses
Demo: Have those students push off each other
Demo: students with same mass push each other
Demo: spring scales

6. Newton’s 3rd Law:
For every force, there is an equal and opposite force
Demo: Student on cart with books
Demo: Student on cart pushes against wall
Demo: Student on hover craft with books
Demo: ? Turning chair with lg. gyro. ?

7. THESE 3 LAWS ALWAYS APPLY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
When you run, you apply a force to the earth but because Earth mass is so Large, acceleration is very small
F = ma

8. Therefore: Galileo was correct
Aristotle is still great (if only misguided at times – like this one).