Problem #1 Person lifting with back: Forces on The Spinal Column Consider the person lifting a heavy box with his back as shown. 8 cm- 10° CGub 29 61 Wub FB 39° CG box (a) Calculate the magnitude of the force FB, in the back muscles that is needed to support the upper body plus the box. Note the cm indicated on the schematic is the lever arm associated with FB. The mass of the upper body is 55.0 kg and the mass of the box is 30.0 kg. 4196 N F 35 cm Pivot 50 cm point Wbox 1 (b) Calculate the magnitude and direction, 0, of the force Fv, exerted by the vertebrae on the spine at the indicated pivot point. 4657 N; 38°
Problem #1 Person lifting with back: Forces on The Spinal Column Consider the person lifting a heavy box with his back as shown. 8 cm- 10° CGub 29 61 Wub FB 39° CG box (a) Calculate the magnitude of the force FB, in the back muscles that is needed to support the upper body plus the box. Note the cm indicated on the schematic is the lever arm associated with FB. The mass of the upper body is 55.0 kg and the mass of the box is 30.0 kg. 4196 N F 35 cm Pivot 50 cm point Wbox 1 (b) Calculate the magnitude and direction, 0, of the force Fv, exerted by the vertebrae on the spine at the indicated pivot point. 4657 N; 38°
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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Transcribed Image Text:Problem #1
Person lifting with back: Forces on The Spinal Column
Consider the person lifting a heavy box with his back as shown.
8 cm-
10°
CGub
29
61
Wub
FB
39°
CG box
(a) Calculate the magnitude of the force FB, in the
back muscles that is needed to support the upper body
plus the box. Note the cm indicated on the schematic is
the lever arm associated with FB. The mass of the upper
body is 55.0 kg and the mass of the box is 30.0 kg.
4196 N
F
35 cm
Pivot
50 cm
point
Wbox
1
(b) Calculate the magnitude and direction, 0, of the force Fv, exerted by the vertebrae on the spine
at the indicated pivot point.
4657 N; 38°
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