If you hold your arm outstretched with palm upward, as in Figure P8.12, the force to keep

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If you hold your arm outstretched with palm upward, as in Figure P8.12, the force to keep your arm from falling comes from your deltoid muscle. The arm of a typical person has mass $4.0 \mathrm{~kg}$ and the distances and angles shown in the figure.

a. What force must the deltoid muscle provide to keep the arm in this position?

b. By what factor does this force exceed the weight of the arm? image text in transcribed

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College Physics A Strategic Approach

ISBN: 9780321907240

3rd Edition

Authors: Randall D. Knight, Brian Jones, Stuart Field

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Question Posted: Mar 29, 2024 11:00 PM

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If you hold your arm outstretched with palm upward, as in Figure P8.12, the force to keep

Question:

FIGURE P8.12 15 Deltoid 17 cm 38 cm

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The deltoid muscle plays a crucial role in holding your arm outstretched To understand the force it ...View the full answer

College Physics A Strategic Approach

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