1. Unit B, Chapter 4,Lesson 5

2. Action and Reaction Newton’s third law states that when one object exerts a force on another object, the second object exerts an equal force and moves in the opposite direction. – Example: A frog jumping off a Lilly pad. All forces come in pairs. –They are called action and reaction forces. – If you push down on your desk, or lean against a wall, the desk and the wall push against you with an equal force. Forces must be balanced whenever an object is at rest.

3. Action and Reaction People who design rockets use Newton’s Third Law. -For example, the gases that are in a rocket’s engine push backward and makes the rocket go up. When you walk it is also an example of action and reaction. –When you push your foot on the ground the ground pushes back with equal force. –Since you push your foot off the ground, it makes you move forward.

4. Newton’s Laws at the Amusement Park Motion, gravity, mass, forces, acceleration, friction, inertia, and reaction, are all important parts of amusement park rides. –An example of the first law is a roller coaster and the swings. If you didn’t have straps on a roller coaster you would fall out and get seriously injured. When the swings start moving in a circular motion, you would fly out of your seat. It wouldn’t be pleasant!

5. Newton’s Laws at the Amusement Park –Another example of the second law is hitting a target with enough force to make the bell ring. It tests your strength. – An example of a ride using Newton’s third law is bumper cars. When they hit, they bounce backward with an equal force. –Newton’s law can be displayed in all different rides. Next time your on a ride, think about what law might be demonstrated.