If the fibers of a pennate muscle are oriented at a 43° angle to a central tendon, how much tension is produced in the tendon when the muscle fibers contract with 1600 N of force?
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If the fibers of a pennate muscle are oriented at a 43° angle to a central tendon, how
much tension is produced in the tendon when the muscle fibers contract with 1600 N of
force?
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- Biceps muscle. A relaxed biceps muscle requires a force of 25.0 N for an elongation of 3.0 cm; under maximum tension, the same muscle requires a force of 500 N for the same elongation. Find the Young modulus for the muscle tissue under each of these conditions if the muscle can be modeled as a uniform cylinder with an initial length of 0.200 m and a cross-sectionalIf the static friction coefficient assume 0.4, calculate the smallest (theta) angel that keep the plate with weight W at its rest.Find the force exerted by the biceps muscle in holding a 1.00-L milk carton (weight 9.90 N) with the forearm parallel to the floor. Assume that the hand is 35.0 cm from the elbow and that the upper arm is 30.0 cm long. The elbow is bent at a right angle, and one tendon of the biceps is attached to the forearm at a position 5.00 cm from the elbow, while the other tendon is attached at 30.0 cm from the elbow. The weight of the forearm and the empty hand is 16.9 N, and the center of gravity of the forearm with hand is at a distance of 16.5 cm from the elbow.
- Triceps 14- 101 2.4 cm Muscles can only contract, so they occur in pairs. In the arm, the biceps muscle is a flexor-that is, it closes the limb. The triceps muscle is an extensor that opens the limb. This configuration is typical of skeletal muscles, bones, and joints in humans and other vertebrates. Most skeletal muscles exert much larger forces within the body than the limbs apply to the outside world. Imagine that a person is pushing down on a tabletop with their hand as shown in the figure. If the person applies a downward force of 70 N with their hand (thats about 16 lbs of force) what force does the triceps tendon exert on the lower arm? The unknown force is indicated by the red arrow in the figure. Ignore the weight of the arm in your calculation. O 5.6 N 70 N 280 N 875 N 30 cm 945 NIf a compressive force of 3.6x104 N is exerted on the end of a 22cm long bone of cross-sectional area 3.6cm2, will the bone break and, if not, how much does it shorten?If the compressive load on the intervertebral disk of a person weighing 800 N is equivalent 34.4% of body weight and the disk has a surface area of 25 cm2. What is the compressive stress on the disk?
- The anterior cruciate ligament in a woman's knee is 2.5 cm long and has a cross-sectional area of 0.50 cm2. Assume that the Young's modulus of the ligament is 1.0×108 N/m2. If a force of 2100 N is applied longitudinally, by how much Δ? will the ligament stretch? Δ?= cmThe bones of the forearm (radius and ulna) are hinged to the humerus at the elbow. The biceps muscle connects to the bones of the forearm about 2.15 cm beyond the joint. Biceps muscle Assume the forearm has a mass of 2.25 kg and a length of 0.425 m. When the humerus and the biceps are nearly vertical and the forearm is horizontal, if a person wishes to Humerus hold an object of mass 6.55 kg so that her forearm remains motionless, what is the force exerted by the biceps muscle? Radius Elbow. Ulna force: N HandOne model of the length LACL of a person's anterior cruciate ligament, or ACL, relates it to the person's height h with the linear function LACL = 0.04606h – (41.29 mm) This relationship does not change significantly with age, gender, or weight. If a basketball player has a height of 2.13 m, approximately how long is his ACL? LACL mm If a stress of 1.05 × 10' N/m2 is applied to his ligament, how much will it stretch? The Young's modulus for the ACL is 1.10 x 108 N/m². change in LACL: mm
- Assume a human leg contains a 50cm long bone with an average cross section of 3cm. By how much (in micrometres) does the bone shorten when the entire body weight of the person is supported by that one leg. The body weight is 700N and the Young's modulus for bone is 1.8 x 1010 Pa Answer:If you are holding a 25lb weight in your hand 30cm from your elbow joint and your biceps brachii is generating a 30lb upward force at its attachment 5cm from the axis at 30° of elbow flexion, what will happen to the weight?Find the force exerted by the biceps muscle in holding a 1.00-L milk carton (weight 9.90 N) with the forearm parallel to the floor. Assume that the hand is 35.0 cm from the elbow and that the upper arm is 30.0 cm long. The elbow is bent at a right angle, and one tendon of the biceps is attached to the forearm at a position 5.00 cm from the elbow, while the other tendon is attached at 30.0 cm from the elbow. The weight of the forearm and the empty hand is 327 N, and the center of gravity of the forearm with hand is at a distance of 16.5 cm from the elbow. MILK 30.0 cm MILK CG 30.0 cm 9.90N 5.00 cm HN -16.5 cm- CG 9.90N 35.0 cm where H = 32.7. 5.00 cm HN -16.5 cm- 35.0 cm where H-327.