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Extension to practical applications 2. The human forearm can be modeled as a simple lever. Indicate on the diagram with proportional arrows, the direction of the load and effort forces on the Radius bone at their points of action. Ignore the weight of the bones and triceps. Draw a fulcrum for the Radius bone. How will the effort force supplied by the bicep compare to the load force? Estimate the ratio of effort force / load force using the distances in the diagram and your collected data above. Scapula Tendon -0.049+ Humerus Bisceps muscle .204 = 0.155 Triceps muscle Radius Bonus! Ulna Page 3 of 3

Extension to practical applications 2. The human forearm can be modeled as a simple lever. Indicate on the diagram with proportional arrows, the direction of the load and effort forces on the Radius bone at their points of action. Ignore the weight of the bones and triceps. Draw a fulcrum for the Radius bone. How will the effort force supplied by the bicep compare to the load force? Estimate the ratio of effort force / load force using the distances in the diagram and your collected data above. Scapula Tendon -0.049+ Humerus Bisceps muscle .204 = 0.155 Triceps muscle Radius Bonus! Ulna Page 3 of 3

Glencoe Physics: Principles and Problems, Student Edition
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter10: Work, Energy And Machines
Section10.2: Machines
Problem 28PP
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Extension to practical applications 2. The human forearm can be modeled as a simple lever. Indicate on the diagram with proportional arrows, the direction of the load and effort forces on the Radius bone at their points of action. Ignore the weight of the bones and triceps. Draw a fulcrum for the Radius bone. How will the effort force supplied by the bicep compare to the load force? Estimate the ratio of effort force / load force using the distances in the diagram and your collected data above. Scapula Tendon -0.049+ Humerus Bisceps muscle .204 = 0.155 Triceps muscle Radius Bonus! Ulna Page 3 of 3
Transcribed Image Text:Extension to practical applications 2. The human forearm can be modeled as a simple lever. Indicate on the diagram with proportional arrows, the direction of the load and effort forces on the Radius bone at their points of action. Ignore the weight of the bones and triceps. Draw a fulcrum for the Radius bone. How will the effort force supplied by the bicep compare to the load force? Estimate the ratio of effort force / load force using the distances in the diagram and your collected data above. Scapula Tendon -0.049+ Humerus Bisceps muscle .204 = 0.155 Triceps muscle Radius Bonus! Ulna Page 3 of 3
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