Question

The illustration shows a diagram of a person standing on the right lower extremity. The right hip abductor muscles must contract to counteract the force of gravity and keep the pelvis level. How much force in Newtons (N) must the right hip abductor muscles generate to keep the pelvis level. The length of AB (moment arm of abductor muscle) is 53.3 mm, the length of BC (moment arm for body mass) is 102.4 mm, the angle BAM (angle that the abductor muscle acts at) is 62.7 degrees and the body mass of the individual minus the right leg is 60.1 kg.

Answer 1

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