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Which class of lever will always represent the following: a muscle must exert more force than...

  1. Which class of lever will always represent the following: a muscle must exert more force than the force of resistance

    (weight lifted).

Science   Anatomy-And-Physiology   
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Answer #1

Class 3 lever always represent the muscle must exert more force than the force of resistance as weight lifting .

Because in this effort between the fulcrum and resistance. The resistance (or load) is on one side of the effort and the fulcrum is located on the other side.

In this scenario lfting the weight like a person produces a greater torque about the lower spine (pivot) – the lifting force is at a greater perpendicular distance to the pivot. The back muscles must exert a huge force to provide a torque that balances the torque from the weight being lifted.

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