Overview

The purpose of this discussion is to practice calculating force in the real world by looking at forces exerted by a part of the human body. You may find that muscles exert bigger forces than you may think.

Instructions:

For this discussion, review your readings for Module 3.0 and study Figure 9.26. You must complete your post before you can see what other students have posted.

1. Make note of the data displayed in your College Physics: Chapter 9> Section 9.6>figure 9.26.
2. Assume it is accurate to three significant figures.
3. Using the data displayed in the figure, compare the force in Figure 9.26 to the weight of the forearm plus its load.
4. Make a second calculation, this time of the force the biceps muscle is exerting. Compare that to the weight supported
5. Conclude by saying what you learned from this exercise.

Reference is below

openstaxorg 9.6 Forces and Torques in Muscles and Joints QAA Triceps Free-body muscle diagram . Biceps * muscle /\\/ Fe ma 2 2.5 kg wail wb co FE we 38 cm CG Wb CG a l"1 r2 '33 (b) Figure 9.26 (a) The figure shows the forearm of a person holding a book. The biceps exert a force F3 to support the weight of the forearm and the book. The triceps are assumed to be relaxed. (b) Here, you can View an approximately equivalent mechanical system with the pivot at the elbow joint as seen in Example 9.4. EXAMPLE 9.4