Basic Biomechanics
7th Edition
ISBN: 9780073522760
Author: Susan J Hall
Publisher: McGraw-Hill Education
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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
If your biceps brachii muscle attaches to your forearm 2 inches below your elbow, the distance from the elbow to the palm of your hand is 18 inches, and you lift a 20 pound weight, how much pull must your muscle exert to achieve elbow flexion? If your biceps brachii muscle attaches to your forearm 2 inches below your elbow, the distance from the elbow to the palm of your hand is 18 inches, and you lift a 20 pound weight, how much pull must your muscle exert to achieve elbow flexion?
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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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