Question 1

Which of the following represents a force that opposes the forward movement of a swimmer?

Accepted Answer

A)  buoyancy 
B)  drag 
C)  lift 
D)  magnus effect 
A)  buoyancy 
B)  drag 
C)  lift 
D)  magnus effect B

Question 2

Why does one tend to shorten one's stride when walking on the ice?

Accepted Answer

increase normal force, so increase friction

Question 3

What is inertia?

Accepted Answer

A)  effect of one object on another 
B)  resistance to change in motion 
C)  rate of change in motion 
D)  tendency of an object to rotate 
A)  effect of one object on another 
B)  resistance to change in motion 
C)  rate of change in motion 
D)  tendency of an object to rotate B

Question 4

Which factor contributes to form drag in objects moving through the air or water?

Accepted Answer

A)  displacement 
B)  total surface area 
C)  size of object 
D)  cross sectional area 
A)  displacement 
B)  total surface area 
C)  size of object 
D)  cross sectional area

Question 5

Which of the following makes it difficult for a runner to change either his speed or direction?

Accepted Answer

A)  torque 
B)  acceleration 
C)  inertia 
D)  velocity 
A)  torque 
B)  acceleration 
C)  inertia 
D)  velocity

Question 6

Change in momentum is the result of an impulse. How may the impulse be changed?

Accepted Answer

A)  distance of backswing 
B)  power being used 
C)  time of application of force 
D)  change kinetics 
A)  distance of backswing 
B)  power being used 
C)  time of application of force 
D)  change kinetics

Question 7

The _____ the time it takes to move a given distance, the greater is the power.

Accepted Answer

A)  greater 
B)  larger 
C)  shorter 
D)  same 
A)  greater 
B)  larger 
C)  shorter 
D)  same

Question 8

In which direction does the force of friction act during a runner's standing start?

Accepted Answer

A)  in a vertical direction 
B)  in the horizontal direction the runner intends to move 
C)  in the horizontal direction opposite the runner's motion 
D)  friction has no direction 
A)  in a vertical direction 
B)  in the horizontal direction the runner intends to move 
C)  in the horizontal direction opposite the runner's motion 
D)  friction has no direction

Question 9

What are two primary factors in friction?

Accepted Answer

A)  the surface area and the weight 
B)  the force pushing two surfaces together and the nature of the surfaces 
C)  the surface area and the nature of the surfaces 
D)  the pushing force and the time of contact 
A)  the surface area and the weight 
B)  the force pushing two surfaces together and the nature of the surfaces 
C)  the surface area and the nature of the surfaces 
D)  the pushing force and the time of contact

Question 10

In which of the following must a force always be present?

Accepted Answer

A)  acceleration 
B)  displacement 
C)  dynamics 
D)  motion 
A)  acceleration 
B)  displacement 
C)  dynamics 
D)  motion

Question 11

Why is it more difficult to stop a sled carrying 2 people on than to stop a sled carrying 1 person if both have the same velocity?

Accepted Answer

increased

Question 12

Why do one's feet drop if the head is lifted in a face floating position in swimming?

Accepted Answer

center of

Question 13

Which of the following diagrams illustrate the rebound of the ball with the lowest coefficient of elasticity?

Accepted Answer

A)  Option A 
B)  Option B 
C)  Option C 
D)  Option D 
A)  Option A 
B)  Option B 
C)  Option C 
D)  Option D

Question 14

What happens to the total energy of the system during the interaction of a golf club and golf ball?

Accepted Answer

A)  remains constant 
B)  increases 
C)  decreases 
D)  remains variable 
A)  remains constant 
B)  increases 
C)  decreases 
D)  remains variable

Question 15

Why is a magician able to pull a tablecloth out from under a table setting without pulling everything onto the floor?

Accepted Answer

A)  friction is overcome by rapid movement of tablecloth 
B)  inertia of pieces of table setting is greater than the displacing force 
C)  both a and b 
D)  this is a magician's trick, it is an illusion 
A)  friction is overcome by rapid movement of tablecloth 
B)  inertia of pieces of table setting is greater than the displacing force 
C)  both a and b 
D)  this is a magician's trick, it is an illusion

Question 16

Why will a steel ball bounce when dropped on a trampoline but not when dropped on a wooden floor?

Accepted Answer

trampoline

Question 17

What is weight?

Accepted Answer

A)  friction times base of support 
B)  mass times acceleration due to gravity 
C)  gravitation times density 
D)  size times base of support 
A)  friction times base of support 
B)  mass times acceleration due to gravity 
C)  gravitation times density 
D)  size times base of support

Question 18

Why is it more difficult to run on the beach than on the street?

Accepted Answer

decreased

Question 19

How does body weight compare with ground reaction force if the body is quickly accelerated downward into a crouch?

Accepted Answer

A)  body weight greater than ground reaction force 
B)  ground reaction force greater than body weight 
C)  magnitudes are equal 
D)  none of the above 
A)  body weight greater than ground reaction force 
B)  ground reaction force greater than body weight 
C)  magnitudes are equal 
D)  none of the above

Question 20

Mechanical work involves a _____ and the _____ that it moves through.

Accepted Answer

A)  force, distance 
B)  distance, velocity 
C)  speed, distance 
D)  acceleration, velocity 
A)  force, distance 
B)  distance, velocity 
C)  speed, distance 
D)  acceleration, velocity

Exam 12: The Conditions of Linear Motion

Which of the following represents a force that opposes the forward movement of a swimmer?

Why does one tend to shorten one's stride when walking on the ice?

What is inertia?

Which factor contributes to form drag in objects moving through the air or water?

Which of the following makes it difficult for a runner to change either his speed or direction?

Change in momentum is the result of an impulse. How may the impulse be changed?

The _____ the time it takes to move a given distance, the greater is the power.

In which direction does the force of friction act during a runner's standing start?

What are two primary factors in friction?

In which of the following must a force always be present?

Why is it more difficult to stop a sled carrying 2 people on than to stop a sled carrying 1 person if both have the same velocity?

Why do one's feet drop if the head is lifted in a face floating position in swimming?

Which of the following diagrams illustrate the rebound of the ball with the lowest coefficient of elasticity?

What happens to the total energy of the system during the interaction of a golf club and golf ball?

Why is a magician able to pull a tablecloth out from under a table setting without pulling everything onto the floor?

Why will a steel ball bounce when dropped on a trampoline but not when dropped on a wooden floor?

What is weight?

Why is it more difficult to run on the beach than on the street?

How does body weight compare with ground reaction force if the body is quickly accelerated downward into a crouch?

Mechanical work involves a _____ and the _____ that it moves through.

Introduction to the Study of Kinesiology

The Musculoskeletal System: The Skeletal Framework and Its Movements

The Musculoskeletal System: The Musculature

The Neuromuscular Basis of Human Motion

The Upper Extremity: The Shoulder Region

The Upper Extremity: The Elbow, Forearm, Wrist, and Hand

The Lower Extremity: The Hip Region

The Lower Extremity: The Knee, Ankle, and Foot

The Spinal Column and Thorax

Terminology and Measurement in Biomechanics

The Description of Human Motion

The Conditions of Rotary Motion

The Center of Gravity and Stability

Kinesiology of Fitness and Exercise

Moving Objects: Pushing and Pulling

Moving Objects: Throwing, Striking, and Kicking

Locomotion: Solid Surface

Locomotion: The Aquatic Environment

Locomotion: When Suspended and Free of Support

Impact

Instrumentation for Motion Analysis

Filters

Mechanical work involves a _ and the _ that it moves through.