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[O] Pure Physics Smart Guides

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  1. SECTION I: MEASUREMENT

    1. Physical Quantities, Units & Measurement
    7 Topics
  2. SECTION II: NEWTONIAN MECHANICS
    2. Kinematics
    8 Topics
  3. 3. Dynamics (Forces)
    7 Topics
  4. 4. Mass, Weight & Density
    4 Topics
  5. 5. Turning Effect of Forces
    4 Topics
  6. 6. Energy, Work & Power
    4 Topics
  7. 7. Pressure
    3 Topics
  8. SECTION III: THERMAL PHYSICS
    8. Temperature
    2 Topics
  9. 9. Kinetic Model of Matter
    2 Topics
  10. 10. Transfer of Thermal Energy
    5 Topics
  11. 11. Thermal Properties of Matter
    3 Topics
  12. SECTION IV: WAVES
    12. General Wave Properties
    3 Topics
  13. 13. Light
    7 Topics
  14. 14. Electromagnetic Spectrum
    2 Topics
  15. 15. Sound
    5 Topics
  16. SECTION V: ELECTRICITY & MAGNETISM
    16. Static Electricity
    5 Topics
  17. 17. Current of Electricity
    3 Topics
  18. 18. D.C. Circuits
    2 Topics
  19. 19. Practical Electricity
    4 Topics
  20. 20. Magnetism
    4 Topics
  21. 21. Electromagnetism
    3 Topics
  22. 22. Electromagnetic Induction
    4 Topics
Chapter 3, Topic 4
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Newton’s Third Law

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Third Law (Action and Reaction)

Definition:
For every action, there is an equal and opposite reaction. 

Four characteristics of third law:

  1. Forces always occur in pairs. Each pair is made up of an action and a reaction.
  2. Action and reaction are equal in magnitude.
  3. Action and reaction act in opposite directions.
  4. Action and reaction act on mutually opposite bodies.