A man with a mass of 75.5 kg stands on one foot. His femur has a...
A man with a mass of 75.5 kg stands on one foot. His femur has a cross-sectional area of 8.00 cm2 and an uncompressed length 50.9 cm. Young’s modulus for compression of the human femur is 9.40 × 109 N/m2.
How much shorter is the femur when the man stands on one foot?
What is the fractional length change of the femur when the person moves from standing on two feet to standing on one foot?
Homework Answers
How much does the femur shorten when a 70-kg person stands on one foot? Assume that...
How much does the femur shorten when a 70-kg person stands on one foot? Assume that in the absence of stress, the femur has a length of 0.5 m. The femur’s cross-sectional area can be modeled as a hollow circular tube with internal diameter d1 = 2.5 cm and external diameter d2 = 3.3 cm. Young’s modulus for bone compression is 9 × 109 N/m2.
During a wrestling match, a 140 kg wrestler briefly stands on one hand during a maneuver...
During a wrestling match, a 140 kg wrestler briefly stands on one hand during a maneuver designed to perplex his adversary. By how much (in m) does the upper arm bone shorten in length? The bone can be represented by a uniform rod 38.0 cm in length and 2.10 cm in radius. Assume Young's modulus for bone under compression is 9 ✕ 109 N/m2. m
Depending on how you fall, you can break a bone easily. The severity of the break...
Depending on how you fall, you can break a bone easily. The severity of the break depends on how much energy the bone absorbs in the accident, and to evaluate this let us treat the bone as an ideal spring. The maximum applied force of compression that one man’s thighbone can endure without breaking is 6.9 x104 N. The minimum effective cross-sectional area of the bone is 5 x10-4 m2, its length is 0.57 m, and Young’s modulus is Y=9.4x109...
Depending on how you fall, you can break a bone easily. The severity of the break depends on how much energy the bone a...
Depending on how you fall, you can break a bone easily. The severity of the break depends on how much energy the bone absorbs in the accident, and to evaluate this let us treat the bone as an ideal spring. The maximum applied force of compression that one man's thighbone can endure without breaking is 7.50 104 N. The minimum effective cross-sectional area of the bone is 3.90 10-4 m2, its length is 0.59 m, and Young's modulus is Y...
Question 22 of 30> The femur of a human leg (mass 10 kg, length 0.9 m) is in traction, as shown in the figure. The center of gravity of the leg is one-third of the distance from the pelvis to...
Question 22 of 30> The femur of a human leg (mass 10 kg, length 0.9 m) is in traction, as shown in the figure. The center of gravity of the leg is one-third of the distance from the pelvis to the bottom of the foot. Two objects, with masses mi and m2, are hung at the ends of the leg using pulleys to provide upward support. A third object of 8 kg is hung to provide tension along the leg....
Question 22 of 30> The femur of a human leg (mass 10 kg, length 0.9 m) is in traction, as shown in the figure. The center of gravity of the leg is one-third of the distance from the pelvis to the bottom of the foot. Two objects, with masses mi and m2, are hung at the ends of the leg using pulleys to provide upward support. A third object of 8 kg is hung to provide tension along the leg....
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