the fulcrum(pivot) is the screw in the door.
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The fulcrum. A Lever is a rigid rod to which a force can be applied to overcome a resistance. The point at which a lever pivots is called the fulcrum.
A fulcrum in a lever is very important because without a fulcrum a lever isn't a lever , and the fulcrum is the main part of a lever.
A Fulcrum is a simple machine invented by the greek mathematician Archimedes who theorized that with a large enough fulcrum one could move the Earth. As for use in a sentance? Here ya go. Archimedes used a fulcrum to lift the earth.
What simple machine is the wheel based on? What do we call the “fulcrum” of a wheel?
where your hand is, your lower hand is the fulcrum.