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Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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9. Joe is holding an abdominal crunch such that his trunk is steady at a 26 degree angle
with the horizontal. How much muscle force (M) is required to maintain static
equilibrium if the muscle force acts at a 51 degree angle to his trunk and inserts 0.09 m
from the hip axis? The weight of his body above the hip axis is 487 N and acts 0.24 m
from the hip axis.
W
M
Transcribed Image Text:9. Joe is holding an abdominal crunch such that his trunk is steady at a 26 degree angle with the horizontal. How much muscle force (M) is required to maintain static equilibrium if the muscle force acts at a 51 degree angle to his trunk and inserts 0.09 m from the hip axis? The weight of his body above the hip axis is 487 N and acts 0.24 m from the hip axis. W M
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