EBK BASIC BIOMECHANICS
7th Edition
ISBN: 8220100409455
Author: Hall
Publisher: MCG
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 8, Problem 10IP
a)
Summary Introduction
To determine: The magnitude of compression acts at the patellofemoral when the angle between quadriceps and patellar tendon is
b)
Summary Introduction
To determine: The magnitude of compression acts at the patellofemoral when the angle between quadriceps and patellar tendon is
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Discuss the advantages and disadvantages of each of the following types of strength measurement: (1) dynamic, (2) free weights, (3) isokinetic, and (4) variable resistance.
1875 N is reduced by 15% by tissues of the ankle joint and 45% by the tissues of the knee joint, how much force is transmitted to the femur
Total compressive knee forces range between
O 1-2 %BW
O 2-4 %BW
3-5 %BW
0.5-1.5 %BW
Chapter 8 Solutions
EBK BASIC BIOMECHANICS
Ch. 8 - INTRODUCTORY PROBLEMS 1. Construct a chart listing...Ch. 8 - INTRODUCTORY PROBLEMS 2. Construct a chart listing...Ch. 8 - INTRODUCTORY PROBLEMS 3. Construct a chart listing...Ch. 8 - INTRODUCTORY PROBLEMS 4. Compare the structure of...Ch. 8 - INTRODUCTORY PROBLEMS 5. Compare the structure of...Ch. 8 - INTRODUCTORY PROBLEMS 6. Describe sequentially the...Ch. 8 - INTRODUCTORY PROBLEMS 7. Describe sequentially the...Ch. 8 - INTRODUCTORY PROBLEMS 8. Describe sequentially the...Ch. 8 - 9. Use the diagram in Sample Problem 8.1 as a...Ch. 8 - Prob. 10IP
Ch. 8 - ADDITIONAL PROBLEMS 1. Explain the roles of...Ch. 8 - ADDITIONAL PROBLEMS 2. Explain the sequencing of...Ch. 8 - Prob. 3APCh. 8 - ADDITIONAL PROBLEMS 4. Which muscles of the lower...Ch. 8 - ADDITIONAL PROBLEMS 5. The squat exercise with a...Ch. 8 - ADDITIONAL PROBLEMS 6. Explain why compression at...Ch. 8 - Prob. 7APCh. 8 - ADDITIONAL PROBLEMS 8. Explain why lifting a heavy...Ch. 8 - ADDITIONAL PROBLEMS 9. Explain how excessive...Ch. 8 - Prob. 10AP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, bioengineering and related others by exploring similar questions and additional content below.Similar questions
- If a person has a vertical force of 10.25N with a nylon strap of a 2.5cm of width and length of 10cm in the trapezius muscle, how much time does the person need to feel pain in the muscle? How much time is needed to injure or damage the muscle? Must show every mathematical process.arrow_forwardney: Load (L) = 5 kgs = Effort E = Fulcrum Weight of forearm = 1.8 kgs L = Load Biceps brachii muscle Distance of load from elbow joint = 35 cm %3D Effort (E) = contraction of biceps brachii Distance of center of mass of forearm from elbow = 17 cm Distance of tendon from elbow = 4 cm A) Draw the free-body diagram to represent the forces and moments Load (L) = weight of object plus forearm B) Write the torque equation for static equilibrium Fulcrum (F) = elbow jointarrow_forwardTRUE OR FALSE 1. The longer the time tension is exerted, the greater the muscular endurance. * 2. The greatest amount of torque is produced by maximum tension in a muscle that is oriented at a 90° angle to the bone, and anatomically attached as far from the joint center as possible. * 3.The greater the torque a muscle can produce, the greater the movement it will produce on the body’s levers. * 4. When the fibers of a pennate muscle shorten, they rotate about their tendon attachment or attachments, progressively decreasing the angle of pennation. * 5.The fast-twitch fibers have smaller diameter than the slow-twitch fibers. * 6.At maximum velocity, no cross-bridges can form, so no force is generated, resulting in the production of zero power. * 7.The smaller number of cross-bridges results in a larger amount of force. *…arrow_forward
- A) Describe the difference between strength and power during a squat. Provide a quantitative example that illustrates the difference. B) During a squat, the weight you have on your shoulders has a certain amount of gravitational potential energy. As you squat down and come to a stop at the bottom of the squat, some of that energy is lost. Where does it go?arrow_forwardIf an individual does training with only the right knee extensor muscles, it is common to see increase in strength in knee extension force for the right leg and an increase in strength in the knee extension force of the left leg (although the increase in force is typically not to the same extent as the force increase in the right leg) a.) True b.) Falsearrow_forward5. Using the hip joint reaction force example we did in class, if the moment arm for the cane is 30 cm and the cane force is applied in the vertical direction, how much would the cane force have to be to reduce the muscle force to 1.5BW? Under that condition, what would the joint reaction force be?arrow_forward
- These figures show that: S Vor (1-min¹) 30 A 2.5 20 1.5 1.0 0.5 (50) 10 Concentric Eccentric Exercise rate (100) 20 (150) Integrated EMG (counts min) B 600 400 200 (50) 30 10 Mean torque on pedals (Nm) (100) Concentric 20 Exercise rate (200) (150) Eccentric 30 O concentric contractions require more oxygen and more EMG than eccentric contractions O concentric contractions are easier to perform than eccentric contractions O eccentric contractions place a greater demand on the cardiovascular and nervous systems compared to concentric contractions O eccentric contractions use less oxygen but more EMG than concentric contractionsarrow_forward7. A severe laceration to a wrist completely severed a major muscle tendon. To suture the ends of the tendon together, the surgeon had to overlap the severed ends by 7.5 cm. What change in passive and maximum active tensions of the muscle would occur as compared to corresponding tensions at resting length of the muscle before injury? A. B. C. D. E. Passive Increase Decrease Increase Increase No change Maximum Active Decrease Decrease Increase No change No changearrow_forwardI. INSTRUCTION: Compute for the following given problem. 1. Emily can lift 21 kg (210 newtons force) using muscles that have a cross-sectional area of 6 cm2. Use this formula to work out how many newtons per square centimetre her muscles can pull with: Formula: Force/Areaarrow_forward
- Considering the Length-Tension Relationship of skeletal muscle fibers, over stretching a muscle fiber or not stretching a muscle fiber enough, results ina decrease in force developed (during contraction) because: 27. A. An "over-stretched" muscle fiber or an “under-stretched" muscle fiber will not allow Calcium, from the sarcoplasmic reticulum, to adequately diffuse into the cytoplasm. B. An "over-stretched" muscle fiber or an "under-stretched" muscle fiber will not allow an optimum amount of contact and overlap for the contractile proteins. C. An "over-stretched" muscle fiber or an“under-stretched" muscle fiber will not allow the Action Potential to reach the troponin-activation channels. D. An "over-stretched" muscle fiber or an "under-stretched" muscle fiber will not allow the Sodium current to depolarize the membrane. Teurons toarrow_forward6:04 OLIVE V 15. The figure diagrams three different scenarios related to the phenomenon A Lowell - Pawtucketville October 6 10:09 AM musculoskeletal system. ܬܝܫܐ 3 - III 5G force generation by the (1) What resent? Edit 8 (a) Explain how your musculoskeletal system uses this mechanism to generate force. (b) What is represented by (1) and (2) in the third figure? (c) In comparison to the other mechanisms available to generate force (by muscles), how effective is this mechanism for controlling the generation c force? (2) What is happening here? Time (med)arrow_forwardGiven the following ankle and knee coordinates calculate the partial internal knee angle to 1 decimal place Ankle z 0.129 m Ankle x 0.37 m Knee z 0.409 m Knee x 0.522 m Answer: re to search 8: T G B N W 8 M 9 O Pa P 4 3°C℃ Partly cloudyarrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning