EBK BASIC BIOMECHANICS
7th Edition
ISBN: 8220100409455
Author: Hall
Publisher: MCG
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Chapter 4, Problem 8AP
Summary Introduction
To find: The force transmitted to femur.
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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?
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STRETCH BAND LATERAL RAISES
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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.
Chapter 4 Solutions
EBK BASIC BIOMECHANICS
Ch. 4 - Prob. 1IPCh. 4 - Prob. 2IPCh. 4 - Prob. 3IPCh. 4 - Prob. 4IPCh. 4 - Prob. 5IPCh. 4 - Prob. 6IPCh. 4 - What kinds of fractures are produced only by...Ch. 4 - Prob. 8IPCh. 4 - In Problem 8, how much total stress is present on...Ch. 4 - Why are men less prone than women to vertebral...
Ch. 4 - Hypothesize about the way or ways in which each of...Ch. 4 - Prob. 2APCh. 4 - Prob. 3APCh. 4 - Hypothesize as to the ability of bone to resist...Ch. 4 - How are the bones of birds and fish adapted for...Ch. 4 - Prob. 6APCh. 4 - Hypothesize as to why men are less prone to...Ch. 4 - Prob. 8APCh. 4 - How much compression is exerted on the radius at...Ch. 4 - If the anterior and posterior deltoids both insert...
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- As an athletic trainer, you are supervising the rehabilitation of a junior baseball pitcher who underwent minor shoulder surgery during the winter. His rehabilitation is progressing well and is now able to do all the exercises you prescribe. You are considering adding some functional exercises to his program. Fully explain what is meant by functional exercises and then be creative and suggest five functional exercises to stress his shoulder. Then explain why each exercise would be considered a functional exercise.arrow_forwardDiscuss the advantages and disadvantages of each of the following types of strength measurement: free weightsarrow_forwardThe data was collected at 100 frames/second. Calculate the velocity and acceleration for each of the joints for the X(horizontal)coordinate. Also, graph the displacement of all three joints (ankle, knee and hip) for the Y (vertical) coordinatearrow_forward
- A human femur undergoes bending and axial loading as shown below. The femur can be modeled as an isotropic linear elastic material with a Young’s modulus of 20 GPa, an outer diameter of 2.5 cm, and an inner diameter of 1.5 cm A) Plot the stress distribution at the cross-sectional plane defined by points A and B. Label the neutral axis and which side is in tension or compression. Do not provide stress magnitudes. B) If point A experiences strain of magnitude 91 μm/m, determine the magnitude of force F. (Recall: for this case, stress and strain are linearly related by one material constant.) C) Assume the force F and cross-sectional area are unchanged from (b), but the bone cross section is now a circle rather than an annulus. Determine the new strain experienced at point A.arrow_forwardIs there a difference in the time to fatigue of the dominant and non-dominant arm? Cite relevant experimental data.arrow_forwardDescribe the lactate threshold and the economy of effort. How are they each measured? What is each relationship to sport performance?arrow_forward
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