It Hold your upper arm vertical and your lower arm horizontal with your hand palm-down on a
Question:
It Hold your upper arm vertical and your lower arm horizontal with your hand palm-down on a table, as shown in Figure P8.14. If you now push down on the table, you'll feel that your triceps muscle has contracted and is trying to pivot your lower arm about the elbow joint. If a person with the arm dimensions shown pushes down hard with a \(90 \mathrm{~N}\) force (about \(20 \mathrm{lb}\) ), what force must the triceps muscle provide? You can ignore the mass of the arm and hand in your calculation.
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To answer this question we need to apply the principles of torque ...View the full answer
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Related Book For 
College Physics A Strategic Approach
ISBN: 9780321907240
3rd Edition
Authors: Randall D. Knight, Brian Jones, Stuart Field
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