Newton’s 3 Laws of Motion

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Newton’s 3 Laws of Motion

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  1. Newton’s Laws of Motion

    Slide 1 - Newton’s Laws of Motion

    • By: Ishaan Chainani
  2. Slide 2

    • Physics is all about motion – why things move and how they move
  3. Slide 3

    • Isaac Newton; a scientist who lived in the 17th century, discovered the 3 laws of motion
  4. Slide 4

    • The first law is also called the law of inertia.
    • But what is inertia?
  5. Slide 5

    • This couch won’t move unless a force acts on it i.e. this couch is ‘lazy’.
    • Scientists call this laziness of an object its inertia.
  6. Slide 6

    • Newton summarized this law as:
    • An object continues to stay at rest
    • Or continues in uniform motion
    • In a straight line
    • Unless an unbalanced force acts on it
  7. Slide 8

    • Newton then went on to explain why it takes more force to move heavier objects
  8. Slide 9

    • If you are pushing a truck down the street, you are going to need a significant amount of force to do so.
  9. Slide 10

    • However you will need barely any force to push a tricycle down the street.
  10. Slide 11

    • Newton summarized this as the second law of motion:
    • Acceleration is produced
    • when a force acts on a mass.
    • The greater the mass (of the object being accelerated),
    • the greater the amount of force needed ( to accelerate the object).
    • Mathematically speaking
    • Acceleration = Force/Mass or a = F/m
  11. Slide 13

    • Finally Newton looked at how objects react
    • The exhaust coming out of the bottom of a rocket, makes it shoot up.
  12. Slide 14

    • The exhaust pushing against the earth is the action
    • The earth reacts by pushing back and lifting up the rocket
  13. Slide 15

    • Newton summarized this as the third law of motion:
    • For every action,
    • There is an equal and opposite
    • Reaction
  14. Were you paying attention?

    Slide 17 - Were you paying attention?