The bones of the forearm (radius and ulna) are hinged to the humerus at the elbow. The biceps muscle connects to the bones of the forearm about 2.15 cm beyond the joint. „Biceps muscle Assume the forearm has a mass of 2.35 kg and a length of 0.445 m. When the humerus and the biceps are nearly vertical and the forearm is horizontal, if a person wishes to Humerus- hold an object of mass 5.75 kg so that her forearm remains motionless, what is the force exerted by the biceps muscle? Radius M Elbow- Ulna force: N Hand

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 90A
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The bones of the forearm (radius and ulna) are hinged to
the humerus at the elbow. The biceps muscle connects to
the bones of the forearm about 2.15 cm beyond the joint.
,Biceps muscle
Assume the forearm has a mass of 2.35 kg and a length of
0.445 m. When the humerus and the biceps are nearly
vertical and the forearm is horizontal, if a person wishes to
Humerus-
hold an object of mass 5.75 kg so that her forearm remains
motionless, what is the force exerted by the biceps muscle?
Radius
M
Elbow-
Ulna
force:
N
Hand
Transcribed Image Text:The bones of the forearm (radius and ulna) are hinged to the humerus at the elbow. The biceps muscle connects to the bones of the forearm about 2.15 cm beyond the joint. ,Biceps muscle Assume the forearm has a mass of 2.35 kg and a length of 0.445 m. When the humerus and the biceps are nearly vertical and the forearm is horizontal, if a person wishes to Humerus- hold an object of mass 5.75 kg so that her forearm remains motionless, what is the force exerted by the biceps muscle? Radius M Elbow- Ulna force: N Hand
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