State the principal of a lever
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Law of the lever. The lever is a movable bar that pivots on a fulcrum attached to a fixed point. The lever operates by applying forces at different distances from the fulcrum, or a pivot. ... The use of velocity in the static analysis of a lever is an application of the principle of virtual work.
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The principal of lever states that the product of load and load arm is always equal to the product of effort and effort arm.
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