Question

8. [1pt) The figure compares the skeleton of a cat to that of an elephant. Relative to its height, the elephant's leg bones are proportionally much thicker than the cat's. Since the strength of bone is determined by UCS, which is roughly the same for all animals, the leg bones must increase with increasing Size of the animal in order to distribute the weight over a larger arca, so as not to increase the stress in the bone. To see why the diameter of the bones must increase proportionally more than the length as the size of the animal increases, consider the following. Suppose we scale the person (from the question above) up by a factor of 5 in all dimensions, le..- 1638 mm, R, 49.14 mm, etc. What is the mass of this person? Answer: 9. [pt] If this scaled-up person were to stand on one leg, what stress would be applied to the femur? Express your answer as percentage of the UCS. Ignore the weight of the leg. Answer:

Answer 1

A = 16.38mm = 16.38 X 53 m B = 49.14 mm = 49.148103 m mag stess mag T (16.38X103)- serious Stressa mag 0.0008424 & stress, mag = mbg π (49.1481032 stressa = mog 0.00075 Stress CA)= stress (B) ma = mb 0.0008424o -o0o75 - ma 0.0008424 0.00075 mb ma - 1.1232 mb ma= 1-12 mb ie. if RM6 = 10 then ma=11-2