What is a lever?
A lever is a simple device that increases the size of a force acting on an object, in order to make the object turn more easily. Levers can be used to help us move or lift things more easily.
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How does a lever work?
Levers use the principle of moments.
They work by transmitting the turning effect of a force, effectively multiplying the force that gets applied to the object.
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What are gears and how do they work?
Gears are circular discs with 'teeth' around their edges. The teeth of different gears interlock so that turning one causes another to turn, in the opposite direction.
They are used to transmit the rotational effect of a force, from one place to another.
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When two gears are connected, do the gears turn in the same direction or opposite directions?
Opposite directions.
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Will large gears or small gears rotate more quickly?
Small gears will rotate more quickly.
(if everything else remains constant, a small gear will rotate 360° more quickly than a large gear)
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