2.  What is a force?  What are the 6 main types of forces that we discussed?

3.  For every action there is an equal and opposite reaction.  If object A pushes on object B, then object B pushes on object A.  You apply a force to your chair and your chair applies a force on you

4.  “If two bodies interact, the magnitude of the force exerted on Object 1 by Object 2 is equal to the magnitude of the force simultaneously exerted on Object 2 by Object 1, and these 2 two forces are opposite in direction.  In other words… If object A applies a force to object B, then B applies an equal (in strength) but opposite (in direction) force to A at the exact same time

5.  The size of the forces equal one another.  If person 1 pushes on person 2 with 50 N of force, then person 2 pushes on person 1 with 50 N of force.

6.  The direction of the force on the first object is opposite to the direction of the force on the second object. The fish’s fins push the water in what direction? How does this help propel the fish through the water?

9.  While driving down the road, a firefly strikes the windshield of a bus and makes a quite obvious mess in front of the face of the driver. This is a clear case of Newton's third law of motion. The firefly hit the bus and the bus hits the firefly. Which of the two forces is greater: the force on the firefly or the force on the bus?

10.  3rd Law video 3rd Law video

11.  Action/ Reaction forces are equal in magnitude but they NEVER cancel each other out because they are acting on different objects!  The only way that they could cancel each other out and equal zero was if they acted on the same object.