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Chapters 3-5 (Forces (Field Force (Magnetism, Gravity), Contact force…

- - - - Types
        
        Sliding friction
        
        The friction between 2 moving objects
        
        Static friction
        
        The friction you have to overcome in order to move an object
        
        Rolling friction
        
        The friction between something round and another surface, such as wheels on a floor
      - 2 things affect it
        
        Surface
        
        Force
  - - - Affecting factors
        
        Distance
        
        Mass
  - - - Affected by
        
        Thickness of atmosphere
        
        Surface area
        
        Speed
  - - - When the force of gravity is equal to air resistance pushing you up
      - You stop accelerating
- - - - If you throw a baseball and a bowling ball at the same speed, the bowling ball has more force.
  - - - A car running into a wall stops.
  - - - A ball bounces up when it hits the ground.
- - - - Acceleration- speeding up, slowing down, or changing direction
- - - - Interval between events