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Basic Biomechanics 6th Edition Hall Test Bank
ISBN13: 9780073376448
ISBN10: 0073376442
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Free Nursing Test Questions:
c14
Student: ___________________________________________________________________________
1. 
Moment of inertia is the angular analogue of what?

2. 
When knee flexion is increased, what happens to the moment of inertia of the leg about the hip?

3. 
In the absence of external torque, which of the following will increase when moment of inertia decreases?

4. 
Torque is the angular analogue of what?

5. 
Which of the following variables contribute to moment of inertia?

6. 
Where is radius of gyration located in relation to center of gravity (COG)?
C. 
same distance from the axis 

7. 
If a diver goes from a full layout position to a tuck position, what will happen to her angular velocity?

8. 
If a diver goes from a full layout position to a tuck position, what will happen to his momentum?

9. 
How many principle axes are there for the human body?

10. 
Somersaulting occurs around which of the following axes of rotation?

11. 
Which of the following variables affects angular momentum?

12. 
Which of the following is referred to as the “quantity of angular motion” possessed by a body?

13. 
Which of the following quantities increases as moment of inertia decreases during the airborne phase of a dive?

14. 
Which of the following acts to produce a change in angular momentum?

15. 
The statement “a rotating body will maintain a state of constant angular motion unless acted on by an external torque” refers to which of the following?
A. 
Newton’s first law of inertia 
B. 
Newton’s second law of acceleration 
C. 
Newton’s third law of action/reaction 

16. 
Centripetal force is related to which of the following?
B. 
tangential acceleration 

17. 
Which of the following is known as “centerseeking” force?

18. 
Which of the following is true of a baserunner weighing 70 Newtons and a baserunner weighing 50 Newtons?
A. 
the centripetal force exerted on the heavier baserunner will be greater 
B. 
the heavier baserunner will not be able to run as fast around the bases, due to a greater centripetal force 
C. 
if the baserunners run at the same velocity around the bases, the heavier baserunner will have to lean in more towards the pitcher’s mound due to a greater centripetal force 
D. 
all of the above are true 

19. 
When a cyclist rounds a curve, where does centripetal force act?
A. 
on the cyclist’s center of gravity 
B. 
on the cycle’s center of gravity 
C. 
on the tires of the cycle 

20. 
Centrifugal force is a misnomer. What is really happening when you feel a pull to the outside while rounding a curve?

21. 
What effect does “choking up” on a bat have?
A. 
reduces moment of inertia 
B. 
increases angular velocity of swing 

22. 
Regarding moment of inertia of the leg with respect to the hip, which of the following leg morphologies would favor a sprinter?
A. 
massive thighs and slimmer lower legs 
B. 
massive lower legs and slimmer thighs 
C. 
leg morphology does not matter 

23. 
Which of the following accurately describes the radius of gyration of the forearm segment?
A. 
It is greater with respect to the wrist than with respect to the elbow. 
B. 
It is greater with respect to the elbow than with respect to the wrist. 
C. 
It is equal with respect to the wrist and with respect to the elbow. 

24. 
Which of the following are accurate units for moment of inertia?

25. 
Rotating around which of the following principal axes of rotation has the least moment of inertia (anatomical position)?
B. 
anteroposterior (sagittal) 

26. 
Which of the following is/are accurate formula(s) for angular momentum?

27. 
If a pendulum stops swinging, which of the following is/are true?

28. 
What are the appropriate units for angular momentum?

29. 
How come gravity does not affect angular momentum?
D. 
gravity does affect angular momentum 

30. 
If total body angular momentum is 0, what will happen as the result of a forceful movement such as a spike?
A. 
compensatory rotation in lower body in opposite direction 
B. 
compensatory rotation in upper body called followthrough 
C. 
angular momentum is no longer 0 

31. 
Why does a figure skater cross his arms tightly across the chest when performing a quadruple axel?
A. 
to reduce moment of inertia 
B. 
to increase angular velocity 
C. 
to increase time in the air 

32. 
According to Newton’s 2^{nd} Law, what is the relationship among torque, moment of inertia, and angular acceleration?

33. 
Which of Newton’s laws (angular analogues) explains why a batter wears cleats?
A. 
1^{st} lawmoment of inertia 
B. 
2^{nd} lawangular acceleration 

34. 
Which of the following is/are most important factor(s) affecting the magnitude of centripetal force?
A. 
tangential linear velocity 
D. 
all of the above are equally important 

35. 
How can a cyclist maintain balance when rounding a sharp curve?
B. 
lean to the inside of the curve 
C. 
lean to the outside of the curve 
E. 
none of the above will affect balance 

36. 
Which of the following are accurate units for centripetal force?

37. 
When a discus thrower spins and then releases the discus, what direction will it travel?
A. 
tangent to the circular path at release 
B. 
tangent to the circular path at beginning of spin 
C. 
will continue in circular path 

38. 
Why do sprint coaches stress “heel to buttocks” during sprinting?
A. 
reduces moment of inertia of the leg with respect to the hip 
B. 
reduces moment of inertia of the lower leg with respect to the knee 
C. 
reduces moment of inertia of the foot with respect to the ankle 
D. 
there is no scientific basis for this coaching cue 

39. 
Why is a bat easier to swing if you grip the barrel instead of the handle?
C. 
moment of inertia is increased 
D. 
easier to grip the barrel 

40. 
Why are golf club heads weighted?
A. 
to increase the moment of inertia of the club with respect to the shoulder 
B. 
to increase the moment of inertia of the club head rotating around the shaft 
C. 
to decrease the moment of inertia of the club with respect to the shoulder 
D. 
to decrease the moment of inertia of the club head rotating around the shaft 

41. 
The product of moment of inertia and angular velocity is ___________________ ___________________.
________________________________________ 
42. 
Angular impulse is the product of ___________________ and ___________________.
________________________________________ 
43. 
When a body is rotating, the force directed toward the center of rotation is called ___________________ force.
________________________________________ 
44. 
An axis that passes through the body’s center of gravity is a ___________________ axis.
________________________________________ 
45. 
Torque is the product of force and moment arm, or the product of moment of inertia and ___________________ ___________________.
________________________________________ 
46. 
Explain conservation of angular momentum using an example in sport, dance or rehabilitation, including appropriate formula.

47. 
Explain transfer of angular momentum using an example in sport, dance or rehabilitation.

48. 
Discuss the factors that affect moment of inertia, including examples.

49. 
Explain why the principal moment of inertia is so much larger around the frontal axis than around the longitudinal axis of a human body.

50. 
Discuss the advantages and disadvantages of a small body size (including muscle mass) for a gymnast performing full body rotations.

51. 
If an airborne performer wishes to maximize the number of revolutions she spins, she should extend the limbs as far from the axis of rotation as possible.
True False 
52. 
During skilled performance of a throw or strike, momentum is generally transferred from the more proximal segments to the more distal segments.
True False 
53. 
The angular analogue of Newton’s second law can be stated algebraically as T=Iα.
True False 
54. 
What has historically been referred to as centrifugal force, is really just inertia.
True False 
55. 
The principle moment of inertia of the human body is greatest around the anteroposterior axis.
True False 
c14 Key
1. 
Moment of inertia is the angular analogue of what?

2. 
When knee flexion is increased, what happens to the moment of inertia of the leg about the hip?

3. 
In the absence of external torque, which of the following will increase when moment of inertia decreases?

4. 
Torque is the angular analogue of what?

5. 
Which of the following variables contribute to moment of inertia?

6. 
Where is radius of gyration located in relation to center of gravity (COG)?
C. 
same distance from the axis 

7. 
If a diver goes from a full layout position to a tuck position, what will happen to her angular velocity?

8. 
If a diver goes from a full layout position to a tuck position, what will happen to his momentum?

9. 
How many principle axes are there for the human body?

10. 
Somersaulting occurs around which of the following axes of rotation?

11. 
Which of the following variables affects angular momentum?

12. 
Which of the following is referred to as the “quantity of angular motion” possessed by a body?

13. 
Which of the following quantities increases as moment of inertia decreases during the airborne phase of a dive?

14. 
Which of the following acts to produce a change in angular momentum?

15. 
The statement “a rotating body will maintain a state of constant angular motion unless acted on by an external torque” refers to which of the following?
A. 
Newton’s first law of inertia 
B. 
Newton’s second law of acceleration 
C. 
Newton’s third law of action/reaction 

16. 
Centripetal force is related to which of the following?
B. 
tangential acceleration 

17. 
Which of the following is known as “centerseeking” force?

18. 
Which of the following is true of a baserunner weighing 70 Newtons and a baserunner weighing 50 Newtons?
A. 
the centripetal force exerted on the heavier baserunner will be greater 
B. 
the heavier baserunner will not be able to run as fast around the bases, due to a greater centripetal force 
C. 
if the baserunners run at the same velocity around the bases, the heavier baserunner will have to lean in more towards the pitcher’s mound due to a greater centripetal force 
D. 
all of the above are true 

19. 
When a cyclist rounds a curve, where does centripetal force act?
A. 
on the cyclist’s center of gravity 
B. 
on the cycle’s center of gravity 
C. 
on the tires of the cycle 

20. 
Centrifugal force is a misnomer. What is really happening when you feel a pull to the outside while rounding a curve?

21. 
What effect does “choking up” on a bat have?
A. 
reduces moment of inertia 
B. 
increases angular velocity of swing 

22. 
Regarding moment of inertia of the leg with respect to the hip, which of the following leg morphologies would favor a sprinter?
A. 
massive thighs and slimmer lower legs 
B. 
massive lower legs and slimmer thighs 
C. 
leg morphology does not matter 

23. 
Which of the following accurately describes the radius of gyration of the forearm segment?
A. 
It is greater with respect to the wrist than with respect to the elbow. 
B. 
It is greater with respect to the elbow than with respect to the wrist. 
C. 
It is equal with respect to the wrist and with respect to the elbow. 

24. 
Which of the following are accurate units for moment of inertia?

25. 
Rotating around which of the following principal axes of rotation has the least moment of inertia (anatomical position)?
B. 
anteroposterior (sagittal) 

26. 
Which of the following is/are accurate formula(s) for angular momentum?

27. 
If a pendulum stops swinging, which of the following is/are true?

28. 
What are the appropriate units for angular momentum?

29. 
How come gravity does not affect angular momentum?
D. 
gravity does affect angular momentum 

30. 
If total body angular momentum is 0, what will happen as the result of a forceful movement such as a spike?
A. 
compensatory rotation in lower body in opposite direction 
B. 
compensatory rotation in upper body called followthrough 
C. 
angular momentum is no longer 0 

31. 
Why does a figure skater cross his arms tightly across the chest when performing a quadruple axel?
A. 
to reduce moment of inertia 
B. 
to increase angular velocity 
C. 
to increase time in the air 

32. 
According to Newton’s 2^{nd} Law, what is the relationship among torque, moment of inertia, and angular acceleration?

33. 
Which of Newton’s laws (angular analogues) explains why a batter wears cleats?
A. 
1^{st} lawmoment of inertia 
B. 
2^{nd} lawangular acceleration 

34. 
Which of the following is/are most important factor(s) affecting the magnitude of centripetal force?
A. 
tangential linear velocity 
D. 
all of the above are equally important 

35. 
How can a cyclist maintain balance when rounding a sharp curve?
B. 
lean to the inside of the curve 
C. 
lean to the outside of the curve 
E. 
none of the above will affect balance 

36. 
Which of the following are accurate units for centripetal force?

37. 
When a discus thrower spins and then releases the discus, what direction will it travel?
A. 
tangent to the circular path at release 
B. 
tangent to the circular path at beginning of spin 
C. 
will continue in circular path 

38. 
Why do sprint coaches stress “heel to buttocks” during sprinting?
A. 
reduces moment of inertia of the leg with respect to the hip 
B. 
reduces moment of inertia of the lower leg with respect to the knee 
C. 
reduces moment of inertia of the foot with respect to the ankle 
D. 
there is no scientific basis for this coaching cue 

39. 
Why is a bat easier to swing if you grip the barrel instead of the handle?
C. 
moment of inertia is increased 
D. 
easier to grip the barrel 

40. 
Why are golf club heads weighted?
A. 
to increase the moment of inertia of the club with respect to the shoulder 
B. 
to increase the moment of inertia of the club head rotating around the shaft 
C. 
to decrease the moment of inertia of the club with respect to the shoulder 
D. 
to decrease the moment of inertia of the club head rotating around the shaft 

41. 
The product of moment of inertia and angular velocity is ___________________ ___________________.
angular momentum 
42. 
Angular impulse is the product of ___________________ and ___________________.
torque, time 
43. 
When a body is rotating, the force directed toward the center of rotation is called ___________________ force.
centripetal 
44. 
An axis that passes through the body’s center of gravity is a ___________________ axis.
cardinal or principle 
45. 
Torque is the product of force and moment arm, or the product of moment of inertia and ___________________ ___________________.
angular acceleration 
46. 
Explain conservation of angular momentum using an example in sport, dance or rehabilitation, including appropriate formula.
Answers will vary 
47. 
Explain transfer of angular momentum using an example in sport, dance or rehabilitation.
Answers will vary 
48. 
Discuss the factors that affect moment of inertia, including examples.
Answers will vary 
49. 
Explain why the principal moment of inertia is so much larger around the frontal axis than around the longitudinal axis of a human body.
Answers will vary 
50. 
Discuss the advantages and disadvantages of a small body size (including muscle mass) for a gymnast performing full body rotations.
Answers will vary 
51. 
If an airborne performer wishes to maximize the number of revolutions she spins, she should extend the limbs as far from the axis of rotation as possible.
FALSE 
52. 
During skilled performance of a throw or strike, momentum is generally transferred from the more proximal segments to the more distal segments.
TRUE 
53. 
The angular analogue of Newton’s second law can be stated algebraically as T=Iα.
TRUE 
54. 
What has historically been referred to as centrifugal force, is really just inertia.
TRUE 
55. 
The principle moment of inertia of the human body is greatest around the anteroposterior axis.
TRUE 
c14 Summary
Category 
# of Questions 
Hall – Chapter 14 
55 
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