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- The rigid bars AB and CD shown in Figure below are supported by pins at A and C and the two rods. Determine the maximum force P that can be applied as shown if its vertical movement is limited to 5 mm. Neglect the weights of all members 3m 3 m Aluminum L- 2 m A-500 mm² E = 70 GPa 3m 3 m Steel L-2 m A-300 mm² E-200 GPaA scallop forces open its shell with an elastic material called abductin, whose Young's modulus is about 2.0 x 106 N/m².Ex 71: Calculate the work done in stretching a wire of diameter 1.2 mm and length 4 m by 0.2 m. Young's modulus of the wire = 2 x 1011 N/m2.
- Proof that the energy stored in the compact bone is given by E = AL0 (Sb) ^ 2 / 2γ. When Sb is bone stress. *A woman is standing erect and with her elbow flexed 90°. She has an 80 N load in her hand and it has a 0.25 m lever arm to the elbow. Her biceps creates 800 N of force and it has a 0.02 m lever arm to the elbow. The type of contraction in the biceps is: Group of answer choices concentric isometric really big eccentricThe illustrated belt is made of rubber (E= = 4 MPa) and has a thickness of 4 mm. It passes through a pulley whose diameter is 20 cm. The belt is subjected to a tension of 50 N. What must be the minimum width, L, so that the stress does not exceed 200 kPa? Answer: 10.3 cm
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- A muscle cell in the biceps is 23 cm long and contains 1500 myofibrils arranged in parallel to each other. each myofibril is made up of many sarcomeres, organized in series, that behave as springs. A relaxed sarcomere is 5 μm long. When contracted, the cell shortens to half its length and develops a force of 33 mN. Each of those structures, the cell, myofibril, and sarcomere, can be modeled as a spring.When we shiver in the cold, our muscles oscillate at a frequency of 13 Hz and with an amplitude of 5 cm. Assume a muscle is a simple harmonic oscillatory and calculate the mass of the load on that oscillator. Calculate the mass of the load on a single myofibril.Calculate the mass of the load on a single sarcomere.A muscle cell in the biceps is 23 cm long and contains 1500 myofibrils arranged in parallel to each other. each myofibril is made up of many sarcomeres, organized in series, that behave as springs. A relaxed sarcomere is 5 μm long. When contracted, the cell shortens to half its length and develops a force of 33 mN. Each of those structures, the cell, myofibril, and sarcomere, can be modeled as a spring.Calculate the spring constant of a muscle cell.The 1500 myofibrils in the muscle cell are arranged in parallel. Calculate the spring constant of a single myofibril. The myofibrils are composed of sarcomeres that are arranged in series. Calculate the number of sarcomeres in each myofibril then calculate the spring constant of a single sarcomere. When we shiver in the cold, our muscles oscillate at a frequency of 13 Hz and with an amplitude of 5 cm. Assume a muscle is a simple harmonic oscillatory and calculate the mass of the load on that oscillator. Calculate the mass of the load on a…An 8.0-cm-long spring is attached to the ceiling. When a 2.3 kg mass is hung from it, the spring stretches to a length of 16 cm. How long is the spring when a 3.0 kg mass is suspended from it? y=