7. A person holds a m kg ball in his hand. The forearm is horizontal, as shown in Figure. The biceps muscle is attached d cm from the elbow joint, and the ball is 1 cm from the elbow joint. Find the upward force exerted by the biceps on the forearm and the downward force exerted by the upper arm on the forearm and acting at the joint. (d = 4 cm, l = 40 cm and M = 10 kg, m = 2 kg, 0 = 15) d cm Bone Muscle 1 cm

7. A person holds a m kg ball in his hand. The forearm is horizontal, as shown in Figure. The biceps muscle is attached d cm from the elbow joint, and the ball is 1 cm from the elbow joint. Find the upward force exerted by the biceps on the forearm and the downward force exerted by the upper arm on the forearm and acting at the joint. (d = 4 cm, l = 40 cm and M = 10 kg, m = 2 kg, 0 = 15) d cm Bone Muscle 1 cm

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

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter5: Three-dimensional Equilibrium

Section: Chapter Questions

Problem 5.39P: The bent rod of negligible weight is supported by the ball-and-socket joint at B and the cables...

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