1. Newton’s Laws

2. Newton’s First Law: The Law of Inertia An object at rest will stay at rest unless acted upon by a force, and an object in motion will stay in motion unless acted upon by a force. In other words …

3. Newton’s Second Law: F=MA An object’s acceleration depends on its mass and the net force acting upon it. In other words …

4. Newton’s Third Law For every action there is an equal but opposite reaction. In other words …

5. Free Fall and Circular Motion

6. Free Fall Free fall is when acceleration is caused only by gravity. The longer something falls, the faster it falls. The speed of gravity is 9.8 m/s 2. 9.8 19.6 0.0 29.4 39.2

7. Circular Motion Centripetal force causes an object to move in a circular motion. It is usually a combination of forces. Example: the combination of the ball’s inertia with the pull of the string causes a centripetal force and the ball travels in a circle.

8. Going into Orbit If you could throw a ball fast enough and high enough, (about 17,000 mph) it would be equal to the pull of gravity, creating a centripetal force.