Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

kin > Kin Ch1 > Flashcards

Kin Ch1 Flashcards

1
Q

what is kinematics?

A

the things that let us describe the displacement or motion of a segment without thinking about all the force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

define displacement

A

change in position over time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

list 5 kinematic variables that describe displacement

A

type location direction magnitude rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are the three types of types of displacement

A

translatory , rotary , and general types of displacement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

displacement type : translatory is

A

linear displacement - rare - more for joint mobs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

displacement type : rotary is

A

angular displacement - rotate about fixed axis - LAQ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

displacement type : general is

A

combos (curvilinear motion ) center of rotation changes - ICOR instantaneous center or rotation or IaR (instantaneous axis of rotation ) - 3d movement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

displacement location and direction

A

sagittal plane - x axis or coronal axis, transverse plane - y axis or vertical axis or longitudinal axis, frontal plane - z axis or AP axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are cardinal planes

A

Transverse, frontal, sagittal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Displacement Magnitude of rotary motion is

A

angular displacement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Displacement magnitude of linear motion is

A

translatory motion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How does one measure angular displacement / rotary motion

A

Range of motion through 360 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

how does one measure linear displacement / translatory motion

A

SI : M m cm
metric system : foot or inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

1 inch = cm

A

1 inch = 2.54 cm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

an example of linear displacement test in PT

A

6 min walk test

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

displacement rate: without a unit of time is

A

speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

displacement rate: with a unit of time is

A

velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

displacement rate: the rate of velocity changing is

A

acceleration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

linear velocity ( velocity of a translating segment ) is

A

m / sec or ft / sec

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

units for acceleration are

A

m / sec squared or ft / sec squared

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

units for angular velocity is

A

deg / sec

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

units for angular acc is

A

deg / sec squared

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Force

A

a push or pull exerted by one object or substance on another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Force is measured in

A

N and lbs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Gravity is

A

the attraction of earth mass to another mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

weight =

A

mass x gravity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

1 kg = __ lb

A

1 kg = 2.2. lb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

1 kg = __ N

A

1 kg = 9.8 N

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

1 lb = ___ slugs

A

1 lb = .031 slugs

30
Q

unit of force is

A

kg at 1 m / sec squared
\ (N)

31
Q

a newton is

A

a unit of force which is kg at 1 m/ sec squared

32
Q

external force vs internal force

A

external is gravity and a lot of others and internal are ligaments and muscles tendons etc

33
Q

difference between measuring mass and measuring force

A

mass does not require direction while forces do

34
Q

vectors do what

A

point of application (where) , direction (where to ) , how much (magnitude), have a name, length

35
Q

COM / COG / Log

A

COM / Cog where gravity acts on an object / balancing point and LoG is the gravity vector

36
Q

COM/COG on a symmetrical object

A

dead center

37
Q

COM/COG on a asymmetrical object ?

A

towards the side with more weight

38
Q

resultant force meaning

A

the resultant or net effect of all forces that are part of the same LINEAR force system can be composed into a single resultant net vector (typically colinear and coplanar) - the force point of application will be a dot near the heavier magnitude

39
Q

composition forces

A

in the book, these used the composition of parallelograms and took the vector in between two vectors of equal angles to form one vector for both

40
Q

COM of human body is where, when in anatomical upright position

A

anterior to S2

41
Q

LoG has to fall within what on the body?

A

within the base of support, and will move towards the side that is having more weight

42
Q

Base of support BOS

A

stance, or laying down on back whatevs

43
Q

statics

A

the study of the conditions uner which objects remain at rest

44
Q

dynamics

A

study of conditions under which objects move.

45
Q

newtons 1st LAW

A

law of inertia, tells us the conditions under which an object is in equilibrium

46
Q

Inertia

A

the properties that resist initiation of movement in a linear motion and changing linear motion and is directly proportionate to mass

47
Q

Moment of ineria

A

properties of object that resists rotary motion and changes in rotary motion

48
Q

moment is like saying what?

A

torque

49
Q

Torque is like saying what ?

A

moment

50
Q

the term moment/torque refers to…

A

the magnitude of rotation produced by a force

51
Q

dynamic equilibrium ?

A

when the velocity of an object is constant but not zero

52
Q

static equilibrium ?

A

a motionless object where all forces acting on it are balanced

53
Q

Newtons 2nd law

A

law of acceleration : the linear acceleration or angular acceleration of an object is proportional to the net unbalanced forces or torques/moments acting on the object.

54
Q

formula for newtons 2nd law of acceleration

A

a = F unbalanced/m
ox = torque unbalanced / I

55
Q

Formula for newtons 1st law of Inertia

A

sum of forces = 0
sum of all torques/moments = 0

56
Q

a net unbalanced force will make ______ motion; a net unbalanced torque/moment will make ______ motion; a combination of unbalanced force and torque/moments will make ______ motion (curvilinear motion).

A

translatory, rotary, general

57
Q

Linear force systems are what?

A

a force system that exists when ever two or more forces acting on the same segment lie in the same line (colinear) AND in the same plane (coplanar); their action lines if extended would OVERLAP!

58
Q

how are forces in a linear force system designated with + and - signs ?

A

up forward/anterior and to the R = +

down backwards/posterior and to the L = -

59
Q

Concurrent force systems

A

two or more forces acting on a segment can be formed into one force with the composition by parallelogram
if these lines are extended they INTERSECT!

60
Q

Newtons 3rd law is

A

reaction, for every action, there is an equal and opposite reaction

61
Q

Reaction forces are always in the same line and applied to the ______ but contacting objects

A

Different

62
Q

Because the points of application of reaction forces are never on the same object, reaction forces are _______ part of the same force system and typically are not part of the same space diagram. Space diagrams exist in Isolation

A

NEVER

63
Q

the types of forces a joint can sustain ?

A

distraction/traction and compression and tensile forces

64
Q

Torque

A

torque = force x moment arm

65
Q

Torque is the product of

A

the magnitude of one of the forces in a force couple and the moment arm

66
Q

what are the 3 moments that apply to the bones?

A

torsional - spiral fracture, 3 point bending - breaking, bending moments

67
Q

TOTAL mm force vector

A

all the lil fibers creating small vector and sum of all those

68
Q

3 classes of levers?

A
  1. axis in the middle with forces out each side - neck as axis and skull and mm
  2. axis at end of line with resistance force closest to axis and effort further away - push up with axis at toes
  3. axis at end of line with effort force closest to axis and resistance further away - shoveling dirt also biceps
69
Q

4 key structures for movement

A

joints, connective tissues, muscles, nerves

70
Q

kinetics vs kinematics

A

kinetics is slipping on banana peel and wondering about the forces involved and kinematics is wondering about how far u went

71
Q

simultaneous and sequential movements ?

A

simultaneous is a ball rolling forward, sequential is a prone press up segment by segment

72
Q

3 points of equilibrium

A

stable - objects center of mass is lowest, unstable - on one foot, and neutral - rolling down hill

kin (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions