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)...
Related questions
Question
Calculate the back extensor force (Fm) required to keep the trunk in the static position as shown.
Calculate the bone compressive force acting on the lumbar vertebra.
Calculate the bone shear force acting on the lumbar vertebra.
The weight of the trunk (Wtrunk) is 500 N, and it has a moment arm of 0.10 m.
The weight of the arms (Warms) is 50 N, and it has a moment arm of 0.50 m.
The horizontal force from the wall (Fwall-x) is 25 N, and it has a moment arm of 0.25 m.
The vertical force from the wall (Fwall-y) is 50 N, and it has a moment arm of 0.75 m.
The weight of the backpack (Wpack) is 25 N, and it has a moment arm of 0.15 m.
The back extensor muscle has a moment arm of 0.05 m.
Transcribed Image Text:Fwall-x
W pack
Fwall-y
Warms
Wtrunk
Fm
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