Determine the muscle force needed to maintain an upright position for the following subject during single limb stance. Body weight = 240 lbs. Line of gravity (LoG) to rotation point on femur = 4 in. Femoral head to abductor muscle attachment = 2.5 in
a. 384 lbs.
b. 320 lbs.
c. 256 lbs.
d. 150 lbs.
ANS: B
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