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mechanisms (2- linear motion mechanisms (2.2 fixed pulley (2.3 movable…

- - - - F x d = R x r
    - - 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
  - - - F = R
    - - A moveable pulley ts a set of two pulleys — one ts fixed while the other
        can move tn a linear direction.
        
        F = R :2
      - 2.4 compound pulley
        
        This ts a system of fixed and moveable pulleys, often called block and
        tackle.
- - - - N1 x D1 = N2 x D2
    - - They consist of two pulleys or wheels that are a certain distance apart.
        Their axles are parallel and they rotate simultaneously due to the effect
        of the belt.
        The rotation of one axle is transmitted to the other through the
        connected pulleys.
      - 3.3 gear mechanisms and cogwheels
        
        Cogwheels are sets of wheels that have teeth called cogs. The cogs fit into the spaces between the cogs of another wheel, so that one wheel moves the other.
        
        N1 x Z1 = N2 x Z2
        
        3.4 worm gear
        
        This is a screw that moves a helical cogwheel that is set perpendicular to the screw
        
        3.5 Gear mechanisms with a chain
        
        These are two cogwheels with parallel axles that are a certain distance apart, they rotate simultaneously by means of a metal chain or a toothed belt stretched over both wheels.
        
        N1 x Z1 = N2 x Z2
        
        3.6 gear train
        
        This is a system of more than two gears, connected together . The rotary motion of
        the first wheel doves the second wheel , and
        so on
        
        3.7 Pulley trains with belts
        
        It's a system of pulleys, or wheels, with a belt
        formed by more than two wheels.
        
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