Gradebook ORION Downloadable Textbook ent SCREEN PRENTER VERssoN A man holds a 1

Question

Gradebook ORION Downloadable Textbook ent SCREEN PRENTER VERssoN A man holds a 158-N bal in his hand, with the forearm horizontal (see the figure). He can support the ball in this position because of the flexor muscle force M,which is applied perpendicular to the forearm. The forearm weighs 22.9 N and has a center of gravity as indicated. Find (a) the magnitude of M and the (b) magnitude and (e) direction (as a positive angle counterclockowise from horizontal) of the force applied by the upper arm bone to the forearm at the elbow joint. Upper arm bone Flexor muscle Elbow joint 0.0510 mi 0.0890 m 0.330 m (a) N (b) N (c) Number 1 39.8 1089.7 08.8 l Rights Reserved. A Division of lobn Wile &SI; MacBook Air

Explanation / Answer

C.

From Force balance

Since the both force must add to give a net force of zero, So direction of F will be downward.

Direction as a +ve angle CCW from horizontal will be = 270 deg

Direction = 270

Please Upvote. Let me know if you need any help in Part A and B.

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