4. Rotational Motion, Statics . The bones of the forearm are hinged to the humerus (your "funny bone") at the elbow. The biceps muscle connects to the bones of the forearm about 2 cm beyond the elbow joint. Assume that the forearm is 2 kg in mass and 0.4 m long and that the hand holds a mass A of 1.5 kg. The humerus bone and biceps muscle are vertical and your forearm is horizontal, and the arm and mass are in static equilibrium. The diagram above shows all the forces acting on the forearm. Fbone 0.41 Fmuscle mfag mag 0.02 (a) What is the magnitude and direction of the force exerted by the biceps muscle on the forearm? (The forearm is the horizontal bone connecting your hand and elbow) (b) What is the magnitude and direction of the force exerted by the humerus bone on the forearm bone at the elbow joint? (The humerus bone is the vertical bone connecting your elbow and shoulder)

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4. Rotational Motion, Statics
The bones of the forearm are hinged to the
humerus (your "funny bone") at the elbow. The biceps muscle connects to the bones of the
forearm about 2 cm beyond the elbow joint. Assume that the forearm is 2 kg in mass and
0.4 m long and that the hand holds a mass A of 1.5 kg. The humerus bone and biceps muscle
are vertical and your forearm is horizontal, and the arm and mass are in static equilibrium.
The diagram above shows all the forces acting on the forearm.
Fbone
0.41
F muscle
mfag
mag
(a) What is the magnitude and direction of the force exerted by the biceps muscle on the
forearm? (The forearm is the horizontal bone connecting your hand and elbow)
(b) What is the magnitude and direction of the force exerted by the humerus bone on the
forearm bone at the elbow joint? (The humerus bone is the vertical bone connecting your
elbow and shoulder)
Transcribed Image Text:4. Rotational Motion, Statics The bones of the forearm are hinged to the humerus (your "funny bone") at the elbow. The biceps muscle connects to the bones of the forearm about 2 cm beyond the elbow joint. Assume that the forearm is 2 kg in mass and 0.4 m long and that the hand holds a mass A of 1.5 kg. The humerus bone and biceps muscle are vertical and your forearm is horizontal, and the arm and mass are in static equilibrium. The diagram above shows all the forces acting on the forearm. Fbone 0.41 F muscle mfag mag (a) What is the magnitude and direction of the force exerted by the biceps muscle on the forearm? (The forearm is the horizontal bone connecting your hand and elbow) (b) What is the magnitude and direction of the force exerted by the humerus bone on the forearm bone at the elbow joint? (The humerus bone is the vertical bone connecting your elbow and shoulder)
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