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The force of gravity acting on the arm acts through point A. Assume that L1 = 0.0890 m, L2 = 0.320 m and alpha = 12.4 degrees.

The arm in the figure (see attachment) weighs 44.1 N.
The force of gravity acting on the arm acts through point A. Assume that L1 = 0.0890 m, L2 = 0.320 m and alpha = 12.4 degrees.
1.) Determine the magnitude of the tension force Ft in the deltoid muscle.
2.) Determine the magnitude of the tension force Fs  of the shoulder on the humerus (upper-arm bone) to hold the arm in the position shown.
3.) Determine the angle of tension force Fs relative to the x-axis.

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