Answered: A weighted ball is held in hand with…

A weighted ball is held in hand with the elbow fixed at 55° What is the biceps brachii force required to maintain this position? a.-785N b.957N c.785N d.-957N

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter6: Beams And Cables

Section: Chapter Questions

Problem 6.76P: The 50-ft measuring tape weighs 2.4 lb. Compute the span L of the tape to four significant figures.

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Question

A weighted ball is held in hand with the elbow fixed at 55° What is the biceps brachii force required to maintain this position?

a.-785N

b.957N

c.785N

d.-957N

-957N is incorrect

E
55°
20 cm
5 cm
20 kg
90°
Shortest Distance to Pivot i
13
19
1
Line of Action of Force
19

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