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MECHANISMS (Rotary motion mecanisms (pulley trains with belt (multiplying…

- - - - class 1
        
        the fulcrum is between the effort applied and the resistance
      - class 2
        
        the resistance is between the fulcrum and the effort applied
      - class 3
        
        the effort applied is between the fulcrum and the resistance
  - - - is a balance when the effort is equal of the ressistance
    - - is balanced when it satisfies this equation
    - - this is a system of fixed and moveable pulleys, often called block and tackle