Solved: A man holds a 178-N ball in his hand, with the
Chapter 9, Problem 9.136(choose chapter or problem)
A man holds a 178-N ball in his hand, with the forearm horizontal (see the drawing). He can support the ball in this position because of the flexor muscle force , which is applied perpendicular to the forearm. The forearm weighs 22.0 N and has a center of gravity as indicated. Find (a) the magnitude of and (b) the magnitude and direction of the force applied by the upper arm bone to the forearm at the elbow joint.
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