Question

F = ? Biceps muscle Rotation axis r = 4.0 cm cm F_weight 27 cm 50.0 cm © 2010 Pearson Education, Inc. You hold your forearm horizontal, as shown in the figure above. Assume your biceps muscle exerts an upward force of magnitude F on your forearm bones and this force is applied a distance of 4.0 cm from the axis of rotation at the elbow. If the lower arm has a mass of 2.61 kg, the elbow to fingertip distance is 50 cm and the elbow to lower arm center of mass(labeled cm in the figure) distance is 27 cm, what is the magnitude of the force F? (in N) A: 18.6 B: 27.0 C: 39.1 D: 56.7 E: 82.2 F: 119.2 G: 172.8 H: 250.6

          F = ?
Biceps muscle
Rotation axis
r = 4.0 cm
cm
F_weight
27 cm
50.0 cm
© 2010 Pearson Education, Inc.
You hold your forearm horizontal, as shown in the figure above. Assume your biceps muscle exerts an upward force of magnitude F on your forearm bones and this force is applied a distance of 4.0 cm from the axis of rotation at the elbow. If the lower arm has a mass of 2.61 kg, the elbow to fingertip distance is 50 cm and the elbow to lower arm center of mass(labeled cm in the figure) distance is 27 cm, what is the magnitude of the force F?
(in N)
A: 18.6 B: 27.0 C: 39.1 D: 56.7 E: 82.2 F: 119.2 G: 172.8 H: 250.6

F = ?
Biceps muscle
Rotation axis
r = 4.0 cm
cm
Fweight
27 cm
50.0 cm
© 2010 Pearson Education, Inc.
You hold your forearm horizontal, as shown in the figure above. Assume your biceps muscle exerts an upward force of magnitude F on your forearm bones and this force is applied a distance of 4.0 cm from the axis of rotation at the elbow. If the lower arm has a mass of 2.61 kg, the elbow to fingertip distance is 50 cm and the elbow to lower arm center of mass(labeled cm in the figure) distance is 27 cm, what is the magnitude of the force F?
(in N)
A: 18.6 B: 27.0 C: 39.1 D: 56.7 E: 82.2 F: 119.2 G: 172.8 H: 250.6

Added by Todd W.

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