3rd Grade-Ch. 12 Lesson 2 How does force affect motion
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3rd Grade-Ch. 12 Lesson 2 How does force affect motion

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3rd Grade-Ch. 12 Lesson 2 How does force affect motion 3rd Grade-Ch. 12 Lesson 2 How does force affect motion Presentation Transcript

  • CH. 12 LESSON 2 HOW DOES FORCE AFFECT MOTION?
  • Activity-Roll On Hypothesis : I predict that the truck will go further with or without rocks. Without rocks With rocks Distance (cm) truck
  • force
    • any push or pull
    • can change an object’s position or direction of motion
    View slide
  • force
    • push 
    • pull 
    push pull View slide
  •  
  • The greater the force on an object, the greater will be its change in its motion.
  • friction
    • contact force that goes against the motion of an object
  • Equal forces in opposite directions do not cause a change in motion. Tug of war
  • gravity
    • non-contact force that pulls objects toward each other
    • the greater the mass  the greater the force of gravity
  • weight
    • amount of gravity that pulls on an object
  • magnetism
    • non-contact force that pulls on metals with iron in them
  • Let's Review
  • FORCE
    • any push or pull
  • energy
    • It takes ________ to apply or exert a force.
    • A force can cause a _________ in an object’s position or motion.
    change
  • GRAVITY
    • force that pulls objects toward each other
  • FRICTION
    • contact force that goes against the motion of an object
  • mass
    • the greater the _______  the greater the force of gravity
  • IRON
    • Magnetism is a non-contact force that pulls on metals with ___________ in them.