When muscles attach to bones, they usually do so by a series of tendons, as show

Question

When muscles attach to bones, they usually do so by a series of tendons, as shown in figure 1. 27. In the figure, five tendons attach to the bone. The uppermost tendon pulls at 20. 0 degree from the axis of the bone, and each tendon is directed 10. 0 degree from the one next to it. If each tendon exerts a 2. 75N pull on the bone, use vector components to find the magnitude and direction of the resultant force on this bone due to all five tendons. Let the axis of the bone be the +x axis. Draw a graphical sum to check your results from part (a).

Explanation / Answer

total force=2.75(cos20i+sin20j+cos30i+sin30j+cos40i+sin40j+cos50i+sin50j+cos60i+sin60j) =2.75(3.71455i+3.1168j) magnitude=13.33N angle=40deg with +ve x axis..

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