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Forces - Coggle Diagram

- - - - Two poles-North & South, strongest at the poles
      - Like poles repel, unlike poles attract
      - Magnetism can pass through non-magnetic materials, but cannot pass through magnetic materials
- - - - change the shape / size of an object
      - make a stationary object move
      - make a moving object change its speed (increase / decrease) and its direction of movement
      - stop a moving object
- - - - The extension of an elastic object(e.g. spring) is directly proprortional to the force applied to it
      - The spring will go back to its original length when the force is removed so long as we do not exceed the elastic limit
  - - - Two bodies falling through space at the same time, reach the ground at the same time regardless of their weight (Galileo - True but only for vacuum environments)
      - Heavy objects fall at greater speeds than lighter objects (Aristotle - True but only for non-vacuum environments)
    - - All bodies regardless of size exert a pulling force on each other.
      - Gravitational force is the attractive force that exists between things that have mass
      - Size of the force increases when mass of the objects increase, the distance between the object and earth increases
    - - Weight
        
        The force of gravity pulling on matter
        
        The greater the amount of matter, the larger the force of gravity pulling on it and so the weight is greater
      - Mass
        
        Amount of matter in an object, does not change/vary regardless of environment
      - Measurement
        
        Instrument measuring mass = Weighing scale - unit=kg/g/mg
        
        Instrument measuring weight：Spring balance - unit=Newtons
        
        Weight(Force) = Mass(KG) x Gravitational Force(N)