Exam 1

Question 1

What is anthropometry?

Answer 1

The study of body measurements and segments

Question 2

What is the waist-to-hip ratio associated with?

Answer 2

A larger ratio is linked with disease rates

Question 3

What is the crural index?

Answer 3

The length of the tibia / length of the femur x 100

Question 4

What is the global coordinate frame?

Answer 4

The location of any point with respect to the origin

Question 5

What is the local coordinate frame?

Answer 5

The frame itself is attached to and moving with the system

Question 6

What is the somatic coordinate Frame?

Answer 6

The frame is attached to the system but looking at a certain segment

Question 7

What is another name for translation?

Answer 7

Linear motion

Question 8

What is another name for rotation?

Answer 8

Angular motion

Question 9

What makes a kinetic chain simple or complex?

Answer 9

The amount of segments the certain segment is linked to (2 vs 3+)

Question 10

What type of kinetic chain is the most accurate?

Answer 10

Simple

Question 11

What is an open kinetic chain?

Answer 11

The most distal segment is free to move ex) bicep curl

Question 12

What is a closed kinetic chain?

Answer 12

The most distal segment is stationary, and the movement comes from other links ex) pushup

Question 13

Which approach allows for different segments to have different maturities?

Answer 13

Component approach

Question 14

Which approach believes that skill progression is the product of all body parts combined?

Answer 14

Composite approach

Question 15

What are the two common scalar values?

Answer 15

Mass and inertia

Question 16

What does the orientation of a vector describe?

Answer 16

The alignments of the vector in relation to cardinal directions

Question 17

What does the line of action of a vector describe?

Answer 17

The direction of the vector past its end point

Question 18

What is the polar coordinate system?

Answer 18

Location of a point is the radius from the origin by theta

Question 19

What is vector subtraction?

Answer 19

Vectors with the same magnitude that point in opposite directions should equal zero

Question 20

What is vector multiplication?

Answer 20

x or / a scalar by a vector should be written as the scalar number with the vector letter (-9A)

Question 21

What does graphical vector analysis allow us to see?

Answer 21

The horizontal and vertical components of a single vector as separated entities

Question 22

What happens in vector composition?

Answer 22

2+ vectors are summed to make single resultant vector

Question 23

A deviation in Q angle is associated with what?

Answer 23

Pain and muscle imbalance

Question 24

Newton’s 1st law is the law of what?

Answer 24

Inertia

Question 25

What does the law of inertia say?

Answer 25

The system at rest will stay at rest until acted on by external force

Question 26

Newton's 2nd law is the law of what?

Answer 26

Acceleration

Question 27

What does the law of acceleration say?

Answer 27

F = ma

Question 28

Newton's 3rd law is the law of what?

Answer 28

Reaction

Question 29

What does the law of reaction say?

Answer 29

Every action force is met with an equal and opposite reaction force

Question 30

What does the law of gravity explain?

Answer 30

The interaction of objects even at a distance

Question 31

Contact forces are split into which 2 subtypes?

Answer 31

Internal and external

Question 32

Internal contact forces change the what of the system?

Answer 32

Shape

Question 33

Normal force is a component of what other force?

Answer 33

Ground reaction force

Question 34

Normal force is in what direction in relation to the ground?

Answer 34

Perpendicular

Question 35

What is the equation for pressure?

Answer 35

P = f/a

Question 36

What is stress?

Answer 36

An external force acting on a system to deform it

Question 37

What is strain?

Answer 37

The resulting magnitude of deformation measured as length change in system

Question 38

How are stress and strain related?

Answer 38

Stress results in strain

Question 39

What is the range for Poisson's ratio?

Answer 39

0-0.50

Question 40

What do you call the relationship between stress and strain?

Answer 40

Elasiticty

Question 41

Young's Modulus refers to elasticity in what specific condition?

Answer 41

Tension stress

Question 42

What does the yield point signify?

Answer 42

The point where the applied stress leads to permanent deformation

Question 43

Buoyant force acts opposite to what other force?

Answer 43

Weight force

Question 44

What does Archimedes' Principle say?

Answer 44

A body will be buoyant by a force equal to the magnitude of the weight of the displaced water

Question 45

What is stress relaxation?

Answer 45

Gradual reduction in stress in a system over time as the molecules move

Question 46

What is the relationship between creep and stress relaxatino?

Answer 46

Creep over a long period of time causes stress relaxation

Question 47

What is the opposite of propulsive force?

Answer 47

Resistive force (drag)

Question 48

Which force causes circular motion?

Answer 48

Centripetal force

Question 49

What does kinematics study?

Answer 49

Motion without regard to the forces that cause it

Question 50

What is linear displacement?

Answer 50

The change in position of system (vector)

Question 51

What does kinetics study?

Answer 51

The forces that cause motion

Question 52

The directions of the velocity vector and acceleration are the same only in what situation?

Answer 52

If the system is speeding up

Question 53

What happens to the velocity vector and acceleration if the system is slowing down?

Answer 53

They go in opposite directions

Question 54

What does the principle of conservation of linear momentum say?

Answer 54

The total momentum just before collision equals the amount just after collision

Question 55

What are some factors that influence whether a collision will be elastic or inelastic?

Answer 55

Elasticity, friction, air resistance, gravity

Question 56

What is linear impulse?

Answer 56

The product of an applied force by the interval or force application

Question 57

Linear impulse is an expression of which law?

Answer 57

2nd

Question 58

What factor is needed for work to occur?

Answer 58

System needs to be displaced

Question 59

What is power?

Answer 59

The amount of mechanical work performed in a given interval

Question 60

What are the two types of potential energy?

Answer 60

Gravitational and elastic

Question 61

What is elastic potential energy?

Answer 61

Energy stored in a deformed object

Question 62

What does the law of conservation of mechanical energy say?

Answer 62

Total mechanical energy remains the same without external forces

Question 63

What does the principle of work and energy say?

Answer 63

The work of external forces (besides gravity) causes a change in that object's energy