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A third class lever is a lever where the force is applied between the fulcrum and the load. A fishing rod is a third class lever if it is fixed at the base and the hand holding the rod is between that fulcrum and the other end of the rod. It is also a third class lever by extension of your arm, wherein the fulcrum is your elbow and the force is your biceps or triceps muscle, which attaches close to that fulcrum.

In a limiting case, a fishing rod is a first class lever if it is supported between the ends and you hold it at a point beyond that fixed fulcrum. This is not common, I think.

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13y ago

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