Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Law of interaction

11,793 views

Published on

This presentation is about Newton's Law of Interaction.

Published in: Education
  • Login to see the comments

Law of interaction

  1. 1. ACTION-REACTION Joy U. Fulgar THIRD LAW OF MOTION: NEWTON’S
  2. 2. INTERACTIONS PRODUCE FORCES •FORCE is a push or pull. •The forces exerted by two objects on each other are often called an action-reaction force pair.
  3. 3. “For every action, is an equal and reaction”
  4. 4. Whenever one object exerts a force on a second object, the second object exerts an equal but opposite force on the first object.
  5. 5. •One force is called the force and the other force is called the force. •Neither force can exist without the other.
  6. 6. IDENTIFYING ACTION & REACTION •Object A exerts a force on Object B then in reverse Object B exerts a force on object A
  7. 7. •The reaction force is the upward push on the rocket engine by the gas molecules. •This downward push is the action force. IDENTIFYING ACTION & REACTION
  8. 8. Action: tire pushes on road Reaction: road pushes on tire
  9. 9. IDENTIFYING ACTION & REACTION
  10. 10. IDENTIFYING ACTION & REACTION •Action: Tyre pushes road •Reaction: Road pushes tyre
  11. 11. IDENTIFYING ACTION & REACTION
  12. 12. IDENTIFYING ACTION & REACTION •Action: Rocket pushes gas •Reaction: Gas pushes rocket
  13. 13. ACTION AND REACTION ON DIFFERENT MASSES •A bug with a mass of 5 grams flies into the windshield of a moving 1000kg bus. •Which will have the most force? •The bug on the bus •The bus on the bug
  14. 14. ACTION AND REACTION ON DIFFERENT MASSES Consider a cannon and cannon ball. According to Newton’s second law we must consider the masses. Cannon ball: F/m = a Cannon: F/m = a
  15. 15. THINK! •The astronauts working on the space station have a serious problem when they need to move around in space: There is nothing to push on. One solution is to throw something opposite the direction you want to
  16. 16. WHY DON'T ACTION & REACTION FORCES CANCEL? •"If pushes , then pushes with an equal and opposite force. If these forces are equal and opposite, they cancel, producing a net force of zero. This means that neither object can accelerate, which means that Newton's Laws predict that nothing can ever move."
  17. 17. •These forces DO NOT CANCEL because they influence the motion of different objects. The force that exerts on influences 's motion, and the force that exerts on influences 's motion. The force on B can cancel with other forces on - but NOT with forces on (and vice versa).
  18. 18. REFERENCES: • Amrita.olabs.co.in,. (2012). Newton's Third law of Motion. Retrieved from December 2015, from amrita.olabs.co.in/?sub=1&brch=1&sim=105&cnt=1 • http://physics.stackexchange.com/questions/103814/action-and-reaction-pair- problem • Newton's Third Law of Motion (2010). Retrieved from • http://www.4physics.com/phy_demo/newton/newton_3.htm • https://www.grc.nasa.gov/www/k-12/WindTunnel/Activities/third_law_motion.html

×