3. The elastic modulus (for tension) of a section of compact bone in the femur is 30 GPa (30 X 10' Pa). If this bone is subjected to a tensile stress of 60 MPa (60 X 10' Pa), what strain results from this tension?
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- 8. The Achilles tendon, which connects the calf muscles to the heel, is the thickest and strongest tendon in the body. In extreme activities, such as sprinting, it can be subjected to forces. According to one set of experiments, the average area of the Achilles tendon is 80.0 mm², its average length is 30 cm, and its average Young's modulus is 1480 MPa. a) How much tensile stress is required to stretch this muscle by 10.0 % of its length? b) If we model the tendon as a spring, what is its force constant? c) How many times of an 80-kg sprinter weight can be exerted on his Achilles tendon to stretch it by 2.5 cm?A 5.0 x 102 N object is hung from the end of a wire of cross-sectional area 1x106 cm?. The wire stretches from its original length of 200.00 cm to 200.50 cm. What is the stress on the wire? A 5.0 x 10^8 N/m2 (B) 1.0 x 10^8 N/m2 (c) 5.0 x 102 N/m² D 1.0 x 10^6 N/m2A 1.0 x 10-3 kg spider is hanging vertically by a thread that has a Young’s modulus of 4.5 x 109 N/m 2. What is the cross-sectional area of the thread when strained (strain = 0.1) by the full weight of the spider?
- 80. Between each pair of vertebrae in the spinal column is a cylindrical disc of cartilage. Typically, this disc has a radius of about 3.0 X 10-² m and a thickness of about 7.0 x 10-3 m. The shear modulus of cartilage is 1.2 × 10' N/m². Suppose that a shearing force of magnitude 11 N is applied parallel to the top surface of the disc while the bottom surface remains fixed in place. How far does the top surface move relative to the bottom surface?One end of a vertical metallic wire of length 2.8 m and diameter 2.0 mm is attached to a ceiling, and the other end is attached to a 5.0 N weight pan, as shown below. REFER TO PICTURES FOR THE QUESTION. I AM HAVING TROUBLE WITH THE ONE PART.B8