A man holds a 182-N ball in his hand, with the forearm horizontal (see the figur

Question

A man holds a 182-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 19.0 N and has a center of gravity as indicated. Find (a) the magnitude of 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.

https://edugen.wileyplus.com/edugen/courses/crs7924/art/qb/qu/c09/EAT_12261805909660_012154079075039181.gif

Explanation / Answer

a) M*0.051 = 19 * ( 0.051+0.089) + 182*0.33
M = 1229.8 N

b) Sum of forces = 0

Fbone = M - 19 -182 = 1028.8 N

C) is 270 degrees

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