Hip Abductor Muscles Motion of the leg is controlled by a group of three indepen

Question

Hip Abductor Muscles Motion of the leg is controlled by a group of three independent muscles collectively known as the hip abductor muscles. Their principal action is to swing the leg sideways relative to the hip as shown in the figure. Determine the resultant force acting on the pelvis with the forces and anges listed below. (NOTE: Muscles cannot push, they can only pull!) F1:75 N at an angle of 5 to the left of the y-axis. F2: 220 N at an angle of 35° to the left of the y-axis. F3: 100 N at an angle of 50° to the left of the y-axis. a) Use the given coordinate system in the figure and write down equations representing the sum of forces along both directions. y-axis X-axis femur b) Using the sum of forces in part a), find the resulting force vector. Remember that a vector requires both a magnitude and direction. (Answer: 38172 N, 3326 degrees left from negative y-axis) e

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Hip Abductor Muscles Motion of the leg is controlled by a group of three indepen

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