BASIC BIOMECHANICS
8th Edition
ISBN: 9781259913877
Author: Hall
Publisher: RENT MCG
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Chapter 13, Problem 10AP
Tendon forces Ta and Tb are exerted on the patella. The femur exerts force F on the patella. If the magnitude of Tb is 80 N, what are the magnitudes of Ta and F, if no motion is occurring at the joint? (Answer: Ta = 44.8 N, F = 86.1 N)
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Students have asked these similar questions
An isometric exercise is one in which the joint angle does not change during the application of muscle force. For instance, you can join your hands together, pushing down with one hand and pushing up with the other. In each arm, the muscles that provide the force are connected to the bones of the arm by tendons. If you increase the forces but keep the angles the same, the muscles will still contract. Explain how this is possible.
Which of these increases force production?
1. Increasing the velocity of the concentric contraction
2. Increasing the velocity of the eccentric contraction
3. Increasing strength of neural stimulation
4. Holding your breath during contraction
5. Increasing frequency of neural stimulation
6. Decreasing the velocity of the concentric contraction
7. Starting the contraction with the joint in full extension
8. Decreasing the velocity of the eccentric contraction
When the most medial portion of the weight is traveling downwards, what type of muscular contraction is taking place at the wrist joint?
must watch clip to answer
https://www.youtube.com/watch?v=PvoauGkB31M
a. Isometric
b. Concentric
c. Eccentric
d. Isotonic
Chapter 13 Solutions
BASIC BIOMECHANICS
Ch. 13 - Why does a force directed through an axis of...Ch. 13 - Why does the orientation of a force acting on a...Ch. 13 - A 23-kg boy sits 1.5 m from the axis of rotation...Ch. 13 - Prob. 4IPCh. 13 - Two people push on opposite sides of a swinging...Ch. 13 - Prob. 6IPCh. 13 - Prob. 7IPCh. 13 - Prob. 8IPCh. 13 - A 10-kg block sits motionless on a table in spite...Ch. 13 - Prob. 10IP
Ch. 13 - A 35-N hand and forearm are held at a 45 angle to...Ch. 13 - A hand exerts a force of 90 N on a scale at 32 cm...Ch. 13 - A patient rehabilitating a knee injury performs...Ch. 13 - A worker leans over and picks up a 90-N box at a...Ch. 13 - A man carries a 3 m, 32-N board over his shoulder....Ch. 13 - A therapist applies a lateral force of 80 N to the...Ch. 13 - Tendon forces Ta and Tb are exerted on the...
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