Levers and Pulleys
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8 Terms
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Lever
a rigid structure—such as a board, a crowbar, or a bone—that moves on a fixed point called the fulcrum
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Anatomical Pulleys
bones or bony structures that change the applied forces of skeletal muscles
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First class lever
the fulcrum lies between the applied force and the resistance force
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What is an example of a first class lever?
tilting the head forward and backward (nodding)
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Second class level
the resistance is located between the applied force and the fulcrum
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What is an example of a second class lever?
standing on your tiptoes
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Third class lever
the force is applied between the resistance and fulcrum
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What is an example of a third class lever?
flexing the lower arm
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