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Mechanisms (The mechanism can have different uses (Trasport people from A…

- - - - Type one
        
        The fulcrum is between the effort applied and the resistance
      - Type two
        
        The resistance is between the fulcrum and the effort applied
      - type three
        
        The effort applied is between the fulcrum and the resistance
  - - - A fixed pulley is balanced when the effort f is equal to the resistance of the load and it is used to weels and gym equipment
        
        F=R
    - - F=R-2
    - - this is a system of fexed and movable puleys and these are uised to lifts and cranes
- - - - Z1_Z2=N2_N1
  - - - N4_N1=Z1_Z2·Z3_Z4
- - - - The ratio between the rotation velocity of the wheels or pulleys depends on the relative size of the wheels
        
        D1_D2=N1·N2
        
        N·D=N2·D2
    - - They consist of two pulleys or wheels that are a certain distance apart, they are used for industrial machines, vehicle engines and drills
      - It's a system of pulleys, or wheels, with a belt formed by more than two wheels.
        
        N4_N1=D1·D3_D2·D4
        
        The Variation in velocity. Apart from transmitting force and motion, rotary transmissionmechanisms allow velocity to vary in three ways
        
        Multiplying systerms
        
        Constant systems
        
        Reducing systems
    - - The ratio between the rotation veloaues of the wheels depends on the
        number of teeth on each wheel. It's expressed by this equation:
        
        N1·Z1=N2·Z2
        
        Z1_Z2=N2-N1
    - - This is a screw that moves a helical cogwheel that is set perpendicular
        to the screw and these are used to lap counters, gear reduction systems and musical turning keys
        
        Wheel=Screw·Grooves_Wheel