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Mechanisms (Classification (transmitting motion (linear, rotary),…

- - - - fixed pulley
        
        wheel that has a groove arount it into which a rope, chain or belt fits. It rotates around an axle that is fixed to an inmobile surface
        
        it's balanced when F=R
      - Movable pulley
        
        it's a set of two pulleys, where one is fixed while the other can move in a linear direction
        
        it's balanced when F = R: 2
      - levers
        
        rigid bar supported by a fulcrum
        
        F x d= R x r
        
        types
        
        the resistance is between the fulcrum and the effort applied
        
        the effort applied is between the fulcrum and the resistance
        
        the fulcrum is between the effort applied and the resistance
      - Compound pulley
        
        system of fixed and moveable pulleys, often called block and tackle
- - - - two or more wheels that are in contact
    - - two pulleys or wheels that are acertain distance apart
    - - sets of wheels with teeth called cogs
    - - screw that moves a helical cogwheel that is set perpendicular to the screw
    - - two cogwheels with paralell axles that are a certain distance apart
    - - system of more than two gears connected together
    - - system of pulleys or wheels, with a belt formed by more than two wheels