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MECHANISMS, image, image, image, image, image, image, image, image, image,…

- - - - a toothed strip of card, cardboard, plywood, chipboard, nails, a plastic lid wooden rod
    - - Pulley A
      - Pulley B
  - - - 1
        
        Draw two axes perpendicular to each other and a
        
        arcumference with its centre point being the
        
        mtersection of the two axes.
      - 2
        
        Place the rompass point on the vertex A and draw
        
        an arc starting at point C. Then place the compass
        
        on the vertex C and draw an arc starting at point
        
        A This forms the conical pomt of the cam.
- - - - spring or electric motor
      - our own muscles
- - - - Levers
        
        Class 1
        
        The load and the effort are on opposite sides of the fulcrum.
        
        Class 2
        
        The load is between the effort and the fulcrum
        
        Class 3
        
        The effort o between the fulcrum and the load
      - Pulleys
        
        Fixed pulleys
        
        Compound pulleys
        
        Moveable pulleys
    - - Friction drive
      - Pulleys with belts
      - Gear mechanisms and cogwheels
      - Worm gear
      - Gear mechanisms with a chain
      - Pulley trains with belts
      - Gear train
  - - - Rack and pinion
      - Nut and bolt
      - Winch (and crank handle)
    - - Crank-link-slide
      - Crankshaft
      - Cam
      - Elentric cam