This picture shows three simple machines; lever, wheel and axle, and pulley. Levers are used to increase force and speed. Wheel and Axles are used to move heavy objects with less work and you can cover more ground with them. Pulleys are used to lift heavy objects. In the lever the fulcrum is in the middle while the load and effort are on opposite sides of the fulcrum. In the wheel and axle the fulcrum is the axle, the effort is the wheel, and the load is whatever the wheel and axle are carrying. In the pulley the fulcrum is pulley wheel, the load is the heavy object being lifted, and the effort is whatever is lifting the load off the ground.
i really lked your example of a pulley and how youmade it colerfull. Keep up the good work with S.T.E.M and i am exsited to see your log about the other simple machines.
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