Classes of Levers
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4 Terms
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What is a first-class lever?
Fulcrum is between effort and load (e.g., neck joint raising head).
2
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What is a second-class lever?
Load is between fulcrum and effort (e.g., standing on toes).
3
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What is a third-class lever?
Effort is between fulcrum and load (e.g., biceps at elbow).
(Most joints in the body are 3rd class levers.)
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