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

Elements Of Electromagnetics
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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
Transcribed Image Text: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
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