Question 1

Most levers in the body are classified as ___________ class levers.

Accepted Answer

A)  first 
B)  second 
C)  third 
D)  fourth

Question 2

The direction of gravity is always going to be a vertically downward pull from the center of mass toward the center of the earth.

Accepted Answer

A) True 
 B)False

Question 3

If a torque produces or tends to produce a counterclockwise motion of the coordinate system, the sign is positive.

Accepted Answer

A) True 
 B)False

Question 4

Motion that occurs about the y-axis takes place in the ___________ plane.

Accepted Answer

A)  sagittal 
B)  frontal 
C)  coronal 
D)  transverse

Question 5

According to Newton's First Law of Motion:

Accepted Answer

A)  Acceleration is directly proportional to the net force applied to a body. 
B)  Acceleration is inversely proportional to the mass of the moving object. 
C)  A body at rest will remain at rest. 
D)  For every action, there is an equal and opposite reaction.

Question 6

The center of gravity of a body is:

Accepted Answer

A)  the theoretical point around which the mass of the object is balanced 
B)  easier to find in asymmetrical objects than it is in symmetrical objects 
C)  the point of origin for gravity's vector force 
D)  A and C 
E)  All of the above

Question 7

In athletics, a large base of support is always advantageous.

Accepted Answer

A) True 
 B)False

Question 8

Velocity of rotary motion is best expressed in:

Accepted Answer

A)  meters/second 
B)  meters/second2 
C)  feet/second 
D)  degrees/second

Question 9

If excessive, this source of force may retard joint motion:

Accepted Answer

A)  gravity 
B)  muscular 
C)  externally applied resistance 
D)  friction

Question 10

Related to first class lever systems, which of the following is most accurate?

Accepted Answer

A)  The point of resistance application lies between the force and the axis. 
B)  They are the most common lever system in the human body. 
C)  They exhibit a force advantage so large weights can be supported or moved by a smaller force. 
D)  The axis of rotation is located between the force and resistance arms.

Question 11

The center of gravity of the adult body in the anatomic position is:

Accepted Answer

A)  anterior to the border of the 11th thoracic vertebra 
B)  anterior to second sacral vertebra 
C)  just below the xiphoid process of the sternum 
D)  just above the knee joint

Question 12

Your patient had an above knee amputation on the left. In which direction did the patient's center of gravity shift?

Accepted Answer

A)  Up and to the right 
B)  Down and to the right 
C)  Up and to the left 
D)  Down and to the left

Question 13

The resultant force is the simplest force that produces the same effect as all the forces acting together.

Accepted Answer

A) True 
 B)False

Question 14

Force is bidirectional and torque is unidirectional.

Accepted Answer

A) True 
 B)False

Question 15

Motion that occurs about the x-axis takes place in the ____________ plane.

Accepted Answer

A)  sagittal 
B)  frontal 
C)  coronal 
D)  transverse

Question 16

The perpendicular distance from the force vector to a joint's axis of motion is referred to as the:

Accepted Answer

A)  moment 
B)  lever arm 
C)  moment arm 
D)  torque

Question 17

The terms, "weight" and "mass" are defined the same and may be used interchangeably.

Accepted Answer

A) True 
 B)False

Question 18

Muscles can only produce force on their bony segments when they contract.

Accepted Answer

A) True 
 B)False

Question 19

A person being propelled in a wheelchair is an example of _____________ equilibrium.

Accepted Answer

A)  static 
B)  dynamic 
C)  neutral 
D)  stable

Question 20

The z-axis may also be referred to as the _____________ axis.

Accepted Answer

A)  anterior-posterior 
B)  medial-lateral 
C)  superior-inferior 
D)  vertical

Exam 2: Mechanical Principles: Kinetics

Most levers in the body are classified as ___________ class levers.

The direction of gravity is always going to be a vertically downward pull from the center of mass toward the center of the earth.

If a torque produces or tends to produce a counterclockwise motion of the coordinate system, the sign is positive.

Motion that occurs about the y-axis takes place in the ___________ plane.

According to Newton's First Law of Motion:

The center of gravity of a body is:

In athletics, a large base of support is always advantageous.

Velocity of rotary motion is best expressed in:

If excessive, this source of force may retard joint motion:

Related to first class lever systems, which of the following is most accurate?

The center of gravity of the adult body in the anatomic position is:

Your patient had an above knee amputation on the left. In which direction did the patient's center of gravity shift?

The resultant force is the simplest force that produces the same effect as all the forces acting together.

Force is bidirectional and torque is unidirectional.

Motion that occurs about the x-axis takes place in the ____________ plane.

The perpendicular distance from the force vector to a joint's axis of motion is referred to as the:

The terms, "weight" and "mass" are defined the same and may be used interchangeably.

Muscles can only produce force on their bony segments when they contract.

A person being propelled in a wheelchair is an example of _____________ equilibrium.

The z-axis may also be referred to as the _____________ axis.