H.3.4. a) The line of action of F is contained in the x-y plane. The moment of F about O is 140 (N-m), and the moment of F about A is 280 (N-m). What are the components of F?

A man holds a 187-N ball in his hand, with the forearm horizontal (see the figure). He can support the ball in this position because of the flexor muscle force M, which is applied perpendicular to the forearm. The forearm weighs 18.5 N and has a center of gravity as indicated. Find (a) the magnitude of M and the (b) magnitude and (c) direction (as a positive angle counterclockwise from horizontal) of the force applied by the upper arm bone to the forearm at the elbow joint. Upper arm bone Elbow joint 0.0510 m+ Flexor muscle -0.0890 m -0.330 m-

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Find the true magnitude and direction of the forces in each member AC, CD.