Answered: Figure 3. Fmuscle Fweight

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

Class III levers are the most common type in the body, one example being the bicep when it is flexing to lift the forearm (see Fig. 3). As with the class II lever, the weight and muscle are on the same side of the fulcrum, but now the muscle is closer to the fulcrum.

Note that this is a lot of force acting on the arm. Use translational equilibrium (Newton’s 1st law) to explain why lifting very large weights with the bicep curl can result in damage to the shoulder joint.

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