Movement Analysis and Biomechanical Principles

Question 1

Kinematic Analysis

Answer 1

Describes the movement, but does not deal with forces

Question 2

Kinetic Analysis

Answer 2

Analysis of force required

Question 3

Kinematic Variables

Answer 3

Location of the movement
Direction of the movement
Magnitude of the motion
Rate or duration of motion

Question 4

Types of motion/displacement

Answer 4

Rotary
Translatory (linear)
Gliding/Sliding
Curvilinear

Question 5

Rotary (Angular) Motion

Answer 5

Movement around a fixed axis in a curved path

Each point on the object moves through the same angle at the same time at a constant distance from the axis of rotation

Question 6

Translatory (Linear) Motion

Answer 6

Movement in a straight line

Each point moves through the same distance, at the same time, in parallel paths

Question 7

Gliding/Sliding

Answer 7

Accessory motion/Arthrokinematics

Another form of translation

Question 8

Curvilinear Motion

Answer 8

When an object rotates about an axis and moves through space at the same time.
EX: Thrown ball/Cup rotating towards mouth and being picked up

Question 9

3 Cardinal Planes

Answer 9

Horizontal
Coronal
Saggital

Question 10

Moment

Answer 10

Potential Torque

Question 11

Osteokinematic Motion

Answer 11

Levers that are moving

Question 12

Magnitude of Motion

Answer 12

Measured in degrees or Radians (isokinetics)

Question 13

Angular Speed

Answer 13

Degrees per second

Question 14

Velocity

Answer 14

Distance divided by time in a given direction

Question 15

Speed

Answer 15

Velocity without direction

Question 16

Kinetics

Answer 16

Tell us why motion is occurring

Study of forces

Question 17

Force

Answer 17

Push or Pull

Question 18

External force

Answer 18

Gravity/Friction/Drag/etc

Question 19

Internal Force

Answer 19

Muscular Contraction/Friction/etc

Question 20

Force Vectors

Answer 20

Point of application
Action line/line of action
Magnitude

Question 21

Point of application

Answer 21

Where the force is applied

Question 22

Line of Action

Answer 22

Direction and angle of the force

Question 23

Weight

Answer 23

Mass X Acceleration

Question 24

Stability

Answer 24

Firmness of balance

The ability to resist a disturbing force

Question 25

Balance Depends On

Answer 25

Strength
Quickness
Proprioception

Question 26

Factors affecting stability

Answer 26

Body Weight
Frictional characteristics of the surfaces
Base of support

Question 27

Relationship between velocity and stability

Answer 27

Increased Velocity=Increased stability

When perterbation is in direction of motion

Question 28

Newton’s First Law

Answer 28

Law of inertia: An object will remain at rest or in motion unless acted on by an unbalanced force

Question 29

Inertia

Answer 29

Property of an object to resist both the initiatino of motion and change in motion

Question 30

Newton’s Second Law

Answer 30

Law of Acceleration
a=F/m
Acceleration of an object is proportional to the unbalanced forces acting on it and inversely proportional to the mass of the object

Question 31

Newton’s Third Law

Answer 31

Law of Reaction

For every action there is an equal and opposite reaction

Question 32

Interaction Pair

Answer 32

Points of application are on different objects

Question 33

Momentum

Answer 33

Quantity of motion possessed by a body

Momentum=mass x velocity

Question 34

Torque

Answer 34

Force x Distance`

Question 35

First Class Lever

Answer 35

Axis of rotation between EA and RA

MA=1

Question 36

Second Class lever

Answer 36

Axis of rotation, RA, EA
Eccentric at most joints
Favors power
MA > 1

Question 37

Third Class Lever

Answer 37

Axis of rotation, EA, RA
Concentric at most joints
Favors speed and ROM
MA < 1

Question 38

Mechanical Advantage

Answer 38

Indicator of efficiency

MA=EA/RA