BASIC BIOMECHANICS
8th Edition
ISBN: 9781259913877
Author: Hall
Publisher: RENT MCG
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Question
Chapter 3, Problem 4IP
Summary Introduction
To draw: Muscle force components on scapula and hence net force acting on scapula.
Introduction: Muscle force developed on scapula can be resolved into horizontal and vertical components.
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Students have asked these similar questions
In the EMG experiment. the measured force came from the contraction of which muscles? Check all that apply.
Check All That Apply
flexor digitorum superficialis
flexor pollicis longus
flexor carpi ulnaris
flexor carpi radialis
palmaris longus
For each of the activities shown, describe the movement using the proper terminology. Describe the movement in stages, using:
the axis
the plane
the terms of movement
The graphs below show the force-versus-shortening-velocity and power-versus-
shortening-velocity curves for four muscles in the human lower extremity. Note
that these curves show this relationship only for shortening activations (positive
shortening velocities), not lengthening activations. And, note that the values
displayed on the axes of the graphs are absolute (not normalized) values of force,
power, and velocity.
These graphs apply to the next three questions.
Force vs Shortening Velocity
Power vs Shortening Velocity
1,500
400
1,200
300
2 900
200
600
100
300
0.0
0.5
1.0
1.5
2.0
0.0
0.5
1.0
1.5
2.0
Shortening Velocity (m/s)
Shortening Velocity (m/s)
muscle 1
muscle 3
muscle 2
muscle 4
Force (N)
Power (W)
Chapter 3 Solutions
BASIC BIOMECHANICS
Ch. 3 - Prob. 1IPCh. 3 - How much force must be applied to a 0.5-kg hockey...Ch. 3 - A rugby player is contacted simultaneously by...Ch. 3 - Prob. 4IPCh. 3 - Draw the horizontal and vertical components of the...Ch. 3 - A gymnastics floor mat weighing 220 N has...Ch. 3 - What is the volume of a milk crate with sides of...Ch. 3 - Prob. 8IPCh. 3 - If the contents of the crate described in Problem...Ch. 3 - Two children sit on opposite sides of a playground...
Ch. 3 - Prob. 1APCh. 3 - Gravitational force on planet X is 40% of that...Ch. 3 - A football player is contacted by two tacklers...Ch. 3 - A 75-kg skydiver in free fall is subjected to a...Ch. 3 - Use a trigonometric solution to find the magnitude...Ch. 3 - Prob. 6APCh. 3 - In the nucleus pulposus of an intervertebral disc,...Ch. 3 - Prob. 9APCh. 3 - Two muscles develop tension simultaneously on...
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Similar questions
- With the shoulder flexed at 30°, the moment arm of the deltoid muscle is 2.0 cm. Solve for the force exerted by the deltoid muscle at the glenohumeral joint give the following assumptions: The deltoid is the only active muscle at the glenohumeral joint The weight of the humerus is 48 N. The center of gravity of the humerus is located 30 cm from the shoulder center of rotation STATIC EQUILIBRIUM EQUATIONS CONSIDERING ONLY THE DELTOID MUSCLE Fo MA = 18 Cn COR B=55". 0-30° RaF 30 cm FG = 24 Narrow_forwardanalyzearrow_forwardIf the muscle fiber is stretched to 150% of muscle length and thentechnically stimulated, what would be the total force measured?arrow_forward
- If 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_forwardDescribe the following terms Muscle Insertion Agonist Antagonist Synergist Abductorarrow_forwardAnalyze the Barbell press (overhead or military press) exercise by breaking the exercise into a lifting phase and lowering phase. For each phase, match the joint movements occurring and then match the force causing movement (muscle or gravity), the force resisting movement (muscle or gravity) and the functional muscle group, type of contraction with each joint for the respective phase. Lifting phase - Elbow - Movement occurring Lifting phase - Elbow - Force causing movement Lifting phase - Elbow - Force resisting movement Lifting phase - Elbow - Functional muscle group, type of contraction Lifting phase - Glenohumeral - Movement occurring Lifting phase - Glenohumeral - Force causing movement Lifting phase - Glenohumeral - Force resisting movement Lifting phase - Glenohumeral - Functional muscle group, type of contraction Lifting phase - Shoulder girdle - Movement occurring Lifting phase - Shoulder girdle - Force causing movement Lifting phase -…arrow_forward
- Due to fiber alignment, the quadriceps muscle group is better at producing increased force, not velocity. True Falsearrow_forwardMaximal muscle force changes continuously throughout the elbow flexion according to the joint angle. True Falsearrow_forwardIn a flowchart with drawing, describe the process of muscle contraction. Make sure to highlight the function of the troponin and tropomyosin complex.arrow_forward
- We move a lot and do not even realize how intricate these movements may be from gross motor to fine motor manipulations. Briefly explain the steps involved in a single muscle contraction beginning at the neuromuscular junction through one complete contraction and relaxation for the sliding filament theory. Don’t forget to include all the major proteins (actin, myosin, troponin and tropomyosin) involved as well as calcium and ATP.arrow_forwardThe flexors of the leg include all of the following except the: Question 29 options: biceps femoris rectus femoris semimenbranosus semitendinosus saritorius Question 30 The muscle fiber arrangement of the rectus femoris is: Question 30 options: bipennate and has greater potential for force bipennate and creates tension through a greater range fusiform and creates tension through a greater range fusiform and has greater potential for force.arrow_forwardTo answer the following questions utilize the attached picture. A. What muscles are acting on the knee from B to C? B. What classification of lever is being demonstrated in this exercise? C. Where is the resistance occurring? D. Where is the point of force application at the knee? E. Utilizing the rules of the lever system, how can this exercise be made easier? (You can’t simply remove the cuff)arrow_forward
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