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Understanding Newton's Third Law: Action and Reaction Explained

Explore the fundamental concepts of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. This chapter delves into free body diagrams, illustrating various scenarios such as a rock in free fall, at the peak of its parabolic trajectory, and falling with or without air resistance. Additionally, understand the complexities of forces acting on a rock on a string, sliding with or without friction. Gain a deeper grasp of the interactions of forces through visual aids and practical examples.

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Understanding Newton's Third Law: Action and Reaction Explained

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  1. Chapter 5 by Robert MacKay

  2. Newton’s Law of Action Reaction (3rd Law) • You can not touch without being touched For every action force there is and equal and oppositely directed reaction force

  3. Newton’s 2nd Law Free Body diagrams A rock in Free Fall

  4. Newton’s 2nd Law Free Body diagrams A rock in Free Fall w

  5. Free Body diagrams A rock At the top of its parabolic trajectory (no air resistance)

  6. Free Body diagrams A rock At the top of its parabolic trajectory (no air resistance) w

  7. Newton’s 2nd Law Free Body diagrams A rock in Free Fall w

  8. Newton’s 2nd Law Free Body diagrams A rock Falling with air resistance

  9. Newton’s 2nd Law Free Body diagrams A rock Falling with air resistance R w

  10. Newton’s 2nd Law Free Body diagrams A rock on a string

  11. Newton’s 2nd Law Free Body diagrams A rock on a String T For the FBD is acceleration, a, up or down ? w

  12. Newton’s 2nd Law Free Body diagrams A rock sliding without friction Vo

  13. Newton’s 2nd Law Free Body diagrams A rock sliding without friction N w

  14. Newton’s 2nd Law Free Body diagrams A rock sliding with friction

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