You are able to hold out your arm in an outstretched horizontalposition because of the action of the deltoid muscle. Assume thehumerus bone has a mass M1=3.6kg, length L=0.66m and its center ofmass is a distance L1=0.33m from the scapula. (For this problemignore the rest of the arm.) The deltoid muscle attaches to thehumerus a distance L2=0.15m from the scapula. The deltoid musclemakes an angle of ??=17?? with the horizontal, as shown. (Figure 1)(Figure 2) Use g=9.8m/s2 throughout the problem.
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