The center of gravity of a 60-kg stroke patient is located at a 70-cm mark. If the patient is supported at 65 cm, where must an 80-g object be hung in order to attain equilibrium? The biceps muscle exerts a vertical force of 7090 N on the lower arm. Calculate (a.) The torque about the axis of rotation through the elbow joint if the biceps and lower arm are perpendicular to each other (b.) If the lower arm is 30 ° lower with respect to the horizontal. Assume that the muscle is attached 5.0 cm from the elbow.

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Answered: The center of gravity of a 60-kg stroke…

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section: Chapter Questions

Problem 1STP

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The center of gravity of a 60-kg stroke patient is located at a 70-cm mark. If the patient is supported at 65 cm, where must an 80-g object be hung in order to attain equilibrium?

The biceps muscle exerts a vertical force of 7090 N on the lower arm. Calculate (a.) The torque about the axis of rotation through the elbow joint if the biceps and lower arm are perpendicular to each other (b.) If the lower arm is 30 ° lower with respect to the horizontal. Assume that the muscle is attached 5.0 cm from the elbow.

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