Question 1

Which of the following is/are true regarding center of mass?

Accepted Answer

A)  in a spherical ball with evenly distributed mass,it is in the exact center
B)  it is the point around which a body's weight is equally balanced regardless of body position
C)  it may be located outside an object or body
D)  both in a spherical ball with evenly distributed mass,it is in the exact center and it is the point around which a body's weight is equally balanced regardless of body position
E)  all of these answers are correct

Question 2

Choose the term that describes the perpendicular distance between a force's line of action and the axis of rotation.

Accepted Answer

A)  moment arm
B)  reaction board
C)  second-class lever
D)  segmental method

Question 3

Which of the following can increase base of support?

Accepted Answer

A)  widen stance
B)  add more points of contact (i.e. 3-point stance to 4-point stance) 
C)  both widen stance and add more points of contact (i.e. 3-point stance to 4-point stance) 
D)  none of these answers is correct

Question 4

Which of the following affects the force-generating capability of a muscle?

Accepted Answer

A)  the muscle length and cross-sectional area
B)  the angle and distance from the joint center of the tendon attachment to bone
C)  the velocity of muscle shortening
D)  all of these answers are correct

Question 5

Which of the following is as important as force in the development of torque?

Accepted Answer

A)  time
B)  distance from axis to line of force
C)  type of axis
D)  none of these answers is correct

Question 6

In which of the following situations is maximal stability desirable?

Accepted Answer

A)  a swimmer's starting position on the blocks before a race
B)  a Sumo wrestler's crouched defensive stance
C)  both a swimmer's starting position on the blocks before a race and a Sumo wrestler's crouched defensive stance
D)  neither a swimmer's starting position on the blocks before a race nor a Sumo wrestler's crouched defensive stance

Question 7

A lever positioned with the applied resistance between the axis and the force is a ________ class lever.

Accepted Answer

The answer of A lever positioned with the applied resistance...

Question 8

A concept indicating a balance between applied forces and inertial forces for a body in motion is called ________ ________.

Accepted Answer

The answer of A concept indicating a balance between applied...

Question 9

Which one of the following incorrectly identifies the parts of a lever within the human body?

Accepted Answer

A)  a bone is the rigid bar
B)  a joint is the axis of rotation
C)  a muscle insertion provides the point of force
D)  COM of the moving segment is the point of resistance
E)  all of these answers are correct

Question 10

Choose the term that describes the lever positioned with the applied force between the fulcrum and the resistance.

Accepted Answer

A)  first-class lever
B)  second-class lever
C)  lever
D)  third-class lever

Question 11

Which of the following is/are true regarding a force couple?

Accepted Answer

A)  created by equal forces on opposite sides of an axis
B)  created by forces acting in the same angular direction
C)  both created by equal forces on opposite sides of an axis and created by forces acting in the same angular direction
D)  none of these answers is correct

Question 12

When net muscle torque and joint movement occur in the same direction,what type of contraction occurs?

Accepted Answer

A)  concentric
B)  eccentric
C)  isometric
D)  isotonic

Question 13

The ability to control equilibrium defines what?

Accepted Answer

A)  stability
B)  balance
C)  mobility
D)  center of mass

Question 14

The perpendicular distance between the line of force and the axis defines what?

Accepted Answer

A)  torque
B)  fulcrum
C)  moment arm
D)  none of these answers is correct

Question 15

Choose the term that describes the resistance to disruption of equilibrium.

Accepted Answer

A)  stability
B)  static equilibrium
C)  third-class lever
D)  torque

Question 16

Which of the following is a characteristic of torque?

Accepted Answer

A)  it is a vector quantity
B)  it is characterized by magnitude
C)  it is characterized by direction
D)  all of these answers are correct

Question 17

In the human body,most of the lever systems formed by muscles pulling on bones are what class?

Accepted Answer

A)  1st class
B)  2nd class
C)  3rd class
D)  no particular class is dominant

Question 18

Choose the term that describes the point of support,or axis,about which a lever may rotate.

Accepted Answer

A)  fulcrum
B)  lever
C)  mechanical advantage
D)  moment arm

Question 19

Which of the following is/are true regarding dynamic equilibrium?

Accepted Answer

A)  applies to bodies in motion
B)  first identified by D'Alembert
C)  both applies to bodies in motion and first identified by D'Alembert
D)  there is no such thing as dynamic equilibrium

Question 20

Choose the term that describes the pair of equal,oppositely directed forces that act on opposite sides of an axis of rotation to produce torque.

Accepted Answer

A)  couple
B)  D'Alembert's principle
C)  first-class lever
D)  fulcrum

Exam 13: Equilibrium and Human Movement

The perpendicular distance between the line of force and the axis defines what?

Correct AnswerverifiedShow Answer

Which of the following is/are true regarding center of mass?

Correct AnswerverifiedShow Answer

The ability to control equilibrium defines what?

Correct AnswerverifiedShow Answer

In which of the following situations is maximal stability desirable?

Correct AnswerverifiedShow Answer

Choose the term that describes the perpendicular distance between a force's line of action and the axis of rotation.

Correct AnswerverifiedShow Answer

Which one of the following incorrectly identifies the parts of a lever within the human body?

Correct AnswerverifiedShow Answer

Choose the term that describes the pair of equal,oppositely directed forces that act on opposite sides of an axis of rotation to produce torque.

Correct AnswerverifiedShow Answer

Choose the term that describes the lever positioned with the applied force between the fulcrum and the resistance.

Correct AnswerverifiedShow Answer

Which of the following is a characteristic of torque?

Correct AnswerverifiedShow Answer

Which of the following affects the force-generating capability of a muscle?

Correct AnswerverifiedShow Answer

Which of the following can increase base of support?

Correct AnswerverifiedShow Answer

Choose the term that describes the resistance to disruption of equilibrium.

Correct AnswerverifiedShow Answer

A concept indicating a balance between applied forces and inertial forces for a body in motion is called ________ ________.

Correct AnswerverifiedShow Answer

A lever positioned with the applied resistance between the axis and the force is a ________ class lever.

Correct AnswerverifiedShow Answer

In the human body,most of the lever systems formed by muscles pulling on bones are what class?

Correct AnswerverifiedShow Answer

Which of the following is as important as force in the development of torque?

Correct AnswerverifiedShow Answer

When net muscle torque and joint movement occur in the same direction,what type of contraction occurs?

Correct AnswerverifiedShow Answer

Which of the following is/are true regarding dynamic equilibrium?

Correct AnswerverifiedShow Answer

Choose the term that describes the point of support,or axis,about which a lever may rotate.

Correct AnswerverifiedShow Answer

Which of the following is/are true regarding a force couple?

Correct AnswerverifiedShow Answer

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A concept indicating a balance between applied forces and inertial forces for a body in motion is called .

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