1. Newton’s 1 st Law of Motion A body in motion will stay in motion or a body at rest will stay at rest unless acted upon by an outside force. Examples, 1. Satellite in orbit 2. Toilet paper pulled fast and slow 3. Hanging mass pulled fast and slow 4. “Inertia Hat”

2. Newton’s 2 nd Law of Motion The acceleration of a body is directly proportional to the net force on it and inversely proportional to its mass. Examples, 1. Net force causes accelerating motion. 2. Carts with varying # of bricks and the same spring force. Acceleration does what?

3. Newton’s 3 rd Law of Motion For every action, there is an equal and opposite reaction. Examples, 1. Table and mass on top are both at rest. What is the action and the reaction? 2. Spring Scale-wt hang, wt over pulley, wt both directions pulling on spring scale. Do they all read the same Newton force? Why? 3. Head on collision of a truck and car. Forces equal?