Exam 1

Question 1

What is mechanics?

Answer 1

The study of FORCES and their effects

Question 2

What is kinematics?

Answer 2

branch of mechancis that deals with the geometry of the motion of objects

Question 3

What are examples of kinematics?

Answer 3

displacements, acceleration, velocity

Question 4

What is kinetics?

Answer 4

the study of relationships between the force system acting on the body and the changes it produces in body motion

Question 5

What is biomechanics?

Answer 5

uses principles of mechanics for SOLVING PROBLEMS related to structure and function of biologic and physiologic systems

Question 6

What are the two biomechanical quantitative analyses used?

Answer 6

Scalars and Vectors

Question 7

Which biomechanical quantitative analysis uses magnitude only?

Answer 7

Scalars

Question 8

What are examples of scalars?

Answer 8

distance, speed, and mass

Question 9

Which biomechanical quantitative analysis uses magnitude AND direction?

Answer 9

Vectors

Question 10

What are examples of vectors?

Answer 10

displacement, velocity, acceleration, weight, momentum, and force

Question 11

Which is a scalar quantity and which is the vector quantity:

Distance
Displacement

Answer 11

Distance= scalar

Displacement= vector

Question 12

What does distance measure?

Answer 12

how much ground an object covered during its motion

Question 13

What does displacement measure?

Answer 13

how far out of place an object is

Think: overall change in position

Question 14

What is the DISTANCE of a runner if she begins at home, runs 20 miles, turns around, and finishes back at home?

Answer 14

40 miles

Question 15

What is the DISPLACEMENT of a runner if she begins at home, runs 15 miles, turns around and finishes back at home?

Answer 15

0 miles

Question 16

Which is the scalar quantity and which is the vector quantity:

Velocity
Speed

Answer 16

Speed: scalar quantity
Velocity: vector quantity

Question 17

What measures how fast an object is moving?

Answer 17

Speed

Question 18

What measures the rate at which an object covers distance?

Answer 18

Speed

Question 19

Is speed or velocity ignorant of direction?

Answer 19

speed

Question 20

What is the equation for speed?

Answer 20

Distance/time

Question 21

What measures the rate at which an objects changes its position?

Answer 21

velocity

Question 22

How do you maximize velocity?

Answer 22

by maximizing the amount displaced from the original position?

Question 23

What is the equation for velocity?

Answer 23

displacement/time

Question 24

Is speed or velocity direction aware?

Answer 24

velocity

Question 25

On a road trip, you drive 450 miles and it takes you a total of 7.5 hours. What is your average speed?

Answer 25

60 miles per hour

Question 26

What is the velocity of your drive if you drive 450 miles from your house to grandma's house, and it takes you a total of 7.5 hours. Assume displacement is equal to distance.

Answer 26

60 miles per hour Displacement is 450 Time is 7.5 hours 450/7.5= 60 miles per hour

Question 27

What does HVLA stand for?

Answer 27

High Velocity, Low amplitude

Question 28

How does HVLA impact a chiropractic adjustment in terms of displacement and amplitude?

Answer 28

Rate of displacement= RAPID | Amplitude= short depth

Question 29

What is acceleration?

Answer 29

CHANGE in velocity/time

Question 30

True or False: If an object is not changing its velocity, then the object is not accelerating.

Answer 30

True

Question 31

True or False: Acceleration is a scalar quantity.

Answer 31

False; vector

Question 32

What are the two factors that determine the direction of the acceleration?

Answer 32

1) Whether the object is speeding up or slowing down | 2) whether the object is moving in the + or - direction

Question 33

Which of the following is a scalar quantity? Which is a vector quantity? Mass Weight

Answer 33

``` Mass= scalar Weight= vector ```

Question 34

Which analysis refers to amount of matter that is contained by the object?

Answer 34

Mass

Question 35

Which quantity analysis is the force of gravity acting upon that object?

Answer 35

weight

Question 36

Is momentum a scalar quantity or vector quantity?

Answer 36

vector

Question 37

Which vector quantity refers to "mass in motion"?

Answer 37

momentum

Question 38

What is the equation for momentum?

Answer 38

mass*velocity | p=m*v

Question 39

Which has a larger momentum: a truck moving at a velocity of 24 m/s or a soft ball moving at the same velocity?

Answer 39

it would be the truck because it has more mass

Question 40

Is Force a vector or scalar quantity?

Answer 40

Vector

Question 41

Define: Force

Answer 41

Action upon a body causing it to deform or move

Question 42

What unit of measurement is used for Force?

Answer 42

Newtons (N)

Question 43

One Newton is the amount of force required to:

Answer 43

give 1-kg mass an acceleration of 1 m/s/s or 1N= 1kg*m/s2

Question 44

What is the equation for Force?

Answer 44

Mass*Acceleration

Question 45

True or False: To increase Force, we either have to increase mass or decrease acceleration.

Answer 45

False; | To increase Force, we can either increase mass, increase acceleration or increase both

Question 46

What is the other name for Newton's First Law of Motion?

Answer 46

Law of Inertia

Question 47

What is inertia?

Answer 47

resistance to having its state of motion changed by application of a force

Question 48

What does the Law of Inertia state?

Answer 48

An object at rests stays at rest and an object in motion stays in motion with the the same speed and in the same direction unless acted upon by an unbalanced force

Question 49

What is the other name for Newton's Second Law of Motion?

Answer 49

Law of Force and Acceleration

Question 50

What does the Law of Force and Acceleration State?

Answer 50

The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object

Question 51

In line with Newton's Second Law of Motion: Which would require more force for acceleration? A baseball or a car? Why?

Answer 51

A car would require more force for acceleration because it has more mass than a baseball.

Question 52

What is the other name for Newton's Third Law of Motion?

Answer 52

Law of Action and Reaction

Question 53

What does Newton's Third Law of Motion State?

Answer 53

For every action, there is an equal and opposite reaction

Question 54

Explain the relationship of SIZE of force between two objects.

Answer 54

The size of the force on the first object EQUALS the size of the force on the second object

Question 55

Explain the relationship of the DIRECTION of force between two objects

Answer 55

the direction of the force on the first object is OPPOSITE the direction of the force on the second object

Question 56

True or False: Every action does not produce an equal and opposite reaction.

Answer 56

True (slide 28) Every action FORCE is met with an equal and opposite reaction FORCE

Question 57

What is friction?

Answer 57

is the force that resists the sliding of two objects in contact

Question 58

What is normal stress?

Answer 58

the intensity of force perpendicular to the surface on which it acts

Question 59

What is an example of normal stress?

Answer 59

gravity

Question 60

What is shear stress?

Answer 60

the intensity of force parallel to the surface on which it acts