A person bends forward to hold a dumbbell of 10.0-kg. The spine and upper body are pivoted at the base of the spine, and represented as a uniform horizontal rod of 25.0-kg with center of mass is 0.21m away from the pivot. The horizontal distance from the dumbbell to the pivot is 0.42m. The spinalis muscle, attached at a point 0.28 m away from the pivot, exerts a tension force 15° above the horizontal spine and maintains the position of the back. a) Determine the magnitude of torque exerted by the weight of the upper body; b) Determine the magnitude of the torque exerted by the dumbbell; c) Determine the magnitude of the torque exerted by the spinalis muscle; d) Determine the magnitude of the tension force exerted by the spinalis muscle. Tmuscle

A person bends forward to hold a dumbbell of 10.0-kg. The spine and upper body are pivoted at the base of the spine, and represented as a uniform horizontal rod of 25.0-kg with center of mass is 0.21m away from the pivot. The horizontal distance from the dumbbell to the pivot is 0.42m. The spinalis muscle, attached at a point 0.28 m away from the pivot, exerts a tension force 15° above the horizontal spine and maintains the position of the back. a) Determine the magnitude of torque exerted by the weight of the upper body; b) Determine the magnitude of the torque exerted by the dumbbell; c) Determine the magnitude of the torque exerted by the spinalis muscle; d) Determine the magnitude of the tension force exerted by the spinalis muscle. Tmuscle

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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