newtons third law action without reaction

when body A exerts a force on body B, body B simultaneously exerts a positively directed force on body A

1. Newton’s Third Law of Motion Subtitle: No action without reaction !

2. Lesson Objectives By the end of the lesson, learners will be able to: Describe Newton’s Third Law. Give everyday examples of action–reaction forces. Predict outcomes of simple scenarios.

3. When you hit the wall with your hand, what do you feel ?

4. But you wanted to hurt the wall… why are YOU also feeling pain?

5. Newton’s Third Law: When object A exerts a force on object B, object B simultaneously exerts an equal and opposite force on object A . Key points : Always a pair of forces . Forces never come alone — they always happen in pairs. Acts simultaneously . Action and reaction occur at the same time .

6. Acts on different objects . One force acts on one object, and the other force acts on the second object.That’s why the forces do not cancel each other out. They are equal in magnitude but in opposite directions. If you know the magnitude and direction of the first you can determine the magnitude and direction of the other force. Formula: FAB=− FBA

7. Lets put the properties in a test

8. Conclusion Newton’s Third Law states that: A) Forces can occur without objects interacting B) For every action, there is an equal and opposite reaction C) Force always acts on the same object D) Force only acts in one direction Forces in Newton’s Third Law: A) Act on the same object B) Are not equal in magnitude C) Act on different objects simultaneously D) Only exist when motion occurs If Object A exerts a force of 60 N on Object B, the force exerted by Object B on Object A is: A) 0 N B) 30 N C) -60 N D) 60 N