8th grade-Ch. 1 Sec. 2 Gravity & Motion

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  • 1. Sec. 2 Gravity & Motion
  • 2. force
      • a push or a pull
  • 3.  
  • 4. gravity
      • force that attracts all objects toward each other
      • measured in newtons
  • 5.
      • mass of objects
      • distance between objects
    • (force as
    • distance )
    strength of gravity depends on 2 factors
  • 6. Newton’s law of universal gravitation
      • every object in universe attracts every other object
  • 7. mass weight Amount of matter in an object Force of gravity on an object
  • 8.  
  • 9. inertia
      • tendency of an object to resist a change in motion
      • ex: egg in glass trick
  • 10. Isaac Newton
  • 11. 2 factors that keep Earth in orbit moves Earth in straight line inertia gravity pulls