To determine the force a person\'s triceps muscle can exert, a doctor uses the p

Question

To determine the force a person's triceps muscle can exert, a doctor uses the procedure shown in the figure(Figure 1), where the patient pushes down with the palm of his hand on a force meter.

Given that the weight of the lower arm is Mg = 16.0 N , and that the force meter reads F = 88.0 N , what is the force FT exerted vertically upward by the triceps?

To determine the force a person's triceps muscle can exert, a doctor uses the procedure shown in the figure(Figure 1), where the patient pushes down with the palm of his hand on a force meter Part A 88.0 N, what is the force Fr exerted vertically Given that the weight of the lower arm is Mg upward by the triceps? 16.0 N, and that the force meter reads F gure 1 of 1 Submit Request Answer Humerus Triceps Next > Provide Feedback Axis Radius Force Ulna meter 2.78 cm 18.6 cm 17.0 cm

Explanation / Answer

Moment = Force * distance;

For Ft, distance from axis = 2.78 cm = 0.0278 m

moment at the axis due to Ft = Ft * 0.0278

For Mg, distance from axis = 18.6 – 2.78 = 15.82 cm = 0.1582 m

moment = 16 * 0.1582

For Force meter, distance = 17 + 18.6 – 2.78 = 32.82 cm = 0.3282 m

moment = - 88 * 0.3282

Ft * 0.0278 + 16 * 0.1582 - 88 * 0.3282 = 0

Ft = 947.856 N

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