a) When standing on one leg, 5/6 of a person's weight is applied at the body's center of mass, as shown in the diagram. The other 1/6 is the mass of the leg on which the person is balancing; therefore, that part of the mass does not affect the torque. If a person's total mass is 95 kg, then what magnitude of force (in Newtons) must the gluteus medius provide to keep the hips level? Assume the distance from M to the pivot is 4 cm and the distance from W to the pivot is 17 cm. Assume all quantities are correct to 2 significant figures. Enter to 2 significant figures M = N b) Calculate the magnitude of the joint reaction force at the pivot. Enter to 2 significant figures J= N c) If the gluteus medius is weak, what effect might that have on the hip when a person stands on one leg?

a) When standing on one leg, 5/6 of a person's weight is applied at the body's center of mass, as shown in the diagram. The other 1/6 is the mass of the leg on which the person is balancing; therefore, that part of the mass does not affect the torque. If a person's total mass is 95 kg, then what magnitude of force (in Newtons) must the gluteus medius provide to keep the hips level? Assume the distance from M to the pivot is 4 cm and the distance from W to the pivot is 17 cm. Assume all quantities are correct to 2 significant figures. Enter to 2 significant figures M = N b) Calculate the magnitude of the joint reaction force at the pivot. Enter to 2 significant figures J= N c) If the gluteus medius is weak, what effect might that have on the hip when a person stands on one leg?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

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a) When standing on one leg, 5/6 of a person's weight is applied at the body's center of mass, as
shown in the diagram. The other 1/6 is the mass of the leg on which the person is balancing;
therefore, that part of the mass does not affect the torque. If a person's total mass is 95 kg, then
what magnitude of force (in Newtons) must the gluteus medius provide to keep the hips level?
Assume the distance from M to the pivot is 4 cm and the distance from W to the pivot is 17 cm.
Assume all quantities are correct to 2 significant figures.
Enter to 2 significant figures
M =
✔N
b) Calculate the magnitude of the joint reaction force at the pivot.
Enter to 2 significant figures
J=
N
c) If the gluteus medius is weak, what effect might that have on the hip when a person stands on one
leg?
A. The muscle may not support the weight and the person may lose balance
B. Other muscles might have to support the weight more causing increased strain or pain.
C. Choices A. and B.

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Step 1: Determine the magnitude of forces, magnitude of joint reaction forces, and Effect of Weak Gluteus.

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Step 2: Find the magnitude of forces.

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Step 3: Find the magnitude of joint reaction forces.

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Step 4: Find the effect of Weak Gluteus Medius.

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