To discriminate: Between the effort arm and resistance arm in a lever. Concept introduction: In humans, the movement of some joints uses the principle of levers. A lever can be defined as a rigid object that can rotate around the stationary fulcrum (fixed point). When the physics is related to biology, the joint axis is the fulcrum, levers are bones, motions are created by the skeletal muscles, and resistance is the weight of the body part.

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Chapter 9.6, Problem 21LO

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To discriminate: Between the effort arm and resistance arm in a lever.

Concept introduction: In humans, the movement of some joints uses the principle of levers. A lever can be defined as a rigid object that can rotate around the stationary fulcrum (fixed point). When the physics is related to biology, the joint axis is the fulcrum, levers are bones, motions are created by the skeletal muscles, and resistance is the weight of the body part.

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