Physics, 20.08.2019 23:00 kadinmorgan

The moment arm of the shoulder abductor muscles is approxi- mately 5 cm from the axis of rotation of the shoulder joint, and the force vector representing shoulder abductor muscle force is oriented at approximately 150° relative to the positive x-axis. the weight of the upper extremity of an 80-kg male is approximately 45 n. if the person is 1.78 m in height, then the center of gravity of the upper-extremity is approximately 0.25 m from the shoulder joint.
3. calculate the vertical component of the joint reaction force.
4. calculate the horizontal component of the joint reaction force.
5. calculate the orientation of the vector representing joint reaction force.

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