Question 1

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

Accepted Answer

A) N•m 
B) N•m2 
C) kg•m2 
D) kg•m

Question 2

Choose the term that describes the following concept: for every torque,there is an equal and opposite torque.

Accepted Answer

A) Newton's 1st law 
B) Newton's 2nd law 
C) Newton's 3rd law 
D) principal axes

Question 3

Which of the following accurately describes the radius of gyration of the forearm segment?

Accepted Answer

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. 
D) Need more information.

Question 4

How can a cyclist maintain balance when rounding a sharp curve?

Accepted Answer

A) slow down 
B) lean to the inside of the curve 
C) lean to the outside of the curve 
D) both slow down and lean to the inside of the curve 
E) none of these answers is correct

Question 5

When a cyclist rounds a curve,where does centripetal force act?

Accepted Answer

A) on the cyclist's center of gravity 
B) on the cycle's center of gravity 
C) on the tires of the cycle 
D) on the ground

Question 6

Choose the term that describes the total-body moment of inertia relative to one of the principal axes.

Accepted Answer

A) principal axes 
B) principal moment of inertia 
C) moment of inertia 
D) center of mass

Question 7

Why is a bat easier to swing if you grip the barrel instead of the handle?

Accepted Answer

A) k is reduced 
B) k is increased 
C) moment of inertia is increased 
D) easier to grip the barrel

Question 8

Which of Newton's laws (angular analogues)explains why a batter wears cleats?

Accepted Answer

A) 1st law - moment of inertia 
B) 2nd law - angular acceleration 
C) 3rd law - reaction 
D) none of these answers is correct

Question 9

When a body is rotating,the force directed toward the center of rotation is called ________ force.

Accepted Answer

The answer of When a body is rotating,the force directed...

Question 10

Choose the term that describes the change in angular momentum equal to the product of torque and time interval over which the torque acts.

Accepted Answer

A) angular impulse 
B) angular kinematics 
C) angular kinetics 
D) angular momentum

Question 11

Centripetal force is related to which of the following?

Accepted Answer

A) radial acceleration 
B) tangential acceleration 
C) both radial acceleration and tangential acceleration 
D) none of these answers is correct

Question 12

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

Accepted Answer

A) angular momentum 
B) angular velocity 
C) both angular momentum and angular velocity 
D) none of these answers is correct

Question 13

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?

Accepted Answer

A) Newton's first law of inertia 
B) Newton's second law of acceleration 
C) Newton's third law of action/reaction 
D) None of these answers is correct

Question 14

What effect does "choking up" on a bat have?

Accepted Answer

A) reduces moment of inertia 
B) increases angular velocity of swing 
C) reduces mass 
D) both reduces moment of inertia and increases angular velocity of swing 
E) all of these answers are correct

Question 15

Choose the term that describes the three mutually perpendicular axes passing through the total body center of gravity.

Accepted Answer

A) principal axes 
B) principal moment of inertia 
C) radius of gyration 
D) moment of inertia

Question 16

Regarding moment of inertia of the leg with respect to the hip,which of the following leg morphologies would favor a sprinter?

Accepted Answer

A) massive thighs and slimmer lower legs 
B) massive lower legs and slimmer thighs 
C) leg morphology does not matter 
D) need more information

Question 17

Rotating around which of the following principal axes of rotation has the least moment of inertia (anatomical position)?

Accepted Answer

A) transverse (frontal) 
B) anteroposterior (sagittal) 
C) longitudinal 
D) need more information

Question 18

Why are golf club heads weighted?

Accepted Answer

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

Question 19

The angular analogue of Newton's second law can be stated algebraically as T = Iα.

Accepted Answer

A) True 
 B)False

Question 20

Angular impulse is the product of ________ and ________.

Accepted Answer

The answer of Angular impulse is the product of ________...

Exam 14: Angular Kinetics of Human Movement