A man holds a 195-N ball in his hand, with the forearm horizontal (see the figure)....
A man holds a 195-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 , which is applied perpendicular to the forearm. The forearm weighs 24.6 N and has a center of gravity as indicated. Find (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
Homework Answers
Taking moment about pivot,
M x 0.051 = 24.6(0.051 + 0.089) + 195(0.33)
M = 1329.29 N
Force, F = 1329.29 - 24.6 - 195 = 1109.69 N
B)
Downward
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