A Free-Body Diagram (Figure 4

Multiple Choice

A free-body diagram (Figure 4.3(b) in the text) shows the biomechanical system of interest, here the forearm-hand segment, isolated from the surrounding world. Forces acting on the segment are: the weight of the forearm and hand (Fg = m g) at their centre of mass, the muscle force (Fm) and the x- and y-components of the joint force (Fjx, Fjy) , producing the three force equations of 4.1. Values that are known are as follows: m = 1.5 kg, r = 0.14 m, rm = 0.05 m and φ = 80Ëš. What is the value of Fjx?

A) 9.69 N
B) 7.15 N
C) 55.8 N
D) 40.57 N