A person’s arm is held with the upper arm vertical, the lower arm and hand horizontal. Find the center of mass of the arm in this configuration, given the following data. upper arm has a mass of 2.5kg and a COM 0.18m above the elbow, lower arm has a mass of 1.6kg and a COM 0.12m to the right of the elbow hand has a mass of 0.64kg and a COM 0.40m to the right of the elbow. Holding a 0.8kg water bottle in his hand
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