Audio: Isaac Newton developed several laws that aim to explain how the world works, specifically motion. This presentation looks at Newton's third law.

Audio: Newton's third law states that for every action, there is an equal and opposite reaction.

Audio: It doesn't matter the size or strength of each object, the force exerted by one object to another will be equal. The force of the machine on the girl's arm is equal to the force put on the machine from the girl's arm.

Audio: lets use the example of a rocket launching into space. The action is the gases being expelled from the rocket.

Audio: The reaction is the gas pushing back on the rocket, which launches the rocket up and into space.

Audio: Another example would be a baseball player hitting a baseball. Action- bat applies a force to the ball, reaction ball applies an equal force to the bat.

Audio: Now it is time to test your knowledge. Identify the following action force and reaction force for when a bowling ball hits the pins.

Audio: look at the motion in your life and try to identify the action/reaction forces. You will be surprised at how many force pairs exist.