Lecture 1

Question 1

What is Statics?

Answer 1

the study of a system in constant motion

these is either no movement or with no change in acceleration or direction

Question 2

What is dynamics?

Answer 2

study of systems subject to acceleration

Question 3

what is kinematics?

Answer 3

study of the appearance or description of motion.

What do you see!

Question 4

What is kinetics?

Answer 4

study of the actions of the force on a body

why does it happen?

Question 5

what are some underlying causes of motion (kinetics)

Answer 5

Forces

• internal = muscle forces
• external = gravity, friction, objects ( bat, club)

Question 6

What is qualitative?

Answer 6

something that can be observed and is subjective
( survey’s)
[gray area]
- strong, skills, agile, flexible, fast

Question 7

What is quantitative?

Answer 7

something dealing with numbers and measurement
[black or white]
- running speed is 5 m/s

Question 8

What are Newtons laws of motion

Answer 8

1 law of inertia
2 law of acceleration
3 law of action- reaction

Question 9

Law of inertia

Answer 9

an object in motion will stay in motion unless acted upon by another force
– absence of a net force the state of the motion will not change

Question 10

law of acceleration

Answer 10

acceleration of a body is proportional to the force causing it and takes place in the direction in which the force acts

F=ma

Question 11

law of action-reaction

Answer 11

for every force that is exerted by one body on another there is an equal and opposite force exerted by the second body on the first

Question 12

What are two types of kinematics

Answer 12

• osteokinematics

- arthrokinematics

Question 13

what is osteokinematics

Answer 13

pathway of the moving bones
( flexion, extension, abduction, adduction)
- we see these motions

Question 14

What is arthrokinematics

Answer 14

movement within the joint at the articular surface
(rolling, gliding, spinning)
we dont see these

Question 15

What is the sagittal plane ?

Answer 15

this is the plane that cut you to separate your left to right vertically and will have forward and backward movements

Question 16

what is the fontal plane ?

Answer 16

this is the plane that cuts you to separate your front and back vertically and will allow for lateral movements

Question 17

what is the transverse plane?

Answer 17

this is the plane that cuts you horizontally at the waist and allow for rotational movements

Question 18

what is the longitudinal axis?

Answer 18

this line goes from the top to the bottom and the transverse plane rotations on it

Question 19

what is the anteroposterior axis?

Answer 19

(sagittal axis)

a line passing form the front to the back through which the frontal plane rotates on

Question 20

what is the mediolateral axis?

Answer 20

(frontal axis)

a line passing through the body from side to side whcih the sagittal plane rotates on

Question 21

What are some movement of the sagittal plane

Answer 21

• flexion-
• extension-returning limb to anatomical positon
• hyperextension-
• dorsiflexion-bring toward bottom leg
• plantar flexion-bring toward the bottom foot ( plants)

Question 22

what are some movements of the frontal plane

Answer 22

• abduction
• adduction
• right and left lateral flexion
• radial and unlnar deviation
• elevation
• depression
• eversion- away from the body
• inversion- toward the the body

Question 23

what is Open packed ( arthrokinematics)?

Answer 23

greatest amount of join movement position of the articulation BUT is least stable
–think of your arm hanging from you shoulder

Question 24

what is closed packed ( arthrokinematics)?

Answer 24

maximum stability due to the maximum amount of contact between surfaces
– think of your hip when you are standing

Question 25

What is a force

Answer 25

a push or a pull (N)

Question 26

what is a torque

Answer 26

a angular force ( Nm)

T= Fd

Question 27

what is Mass

Answer 27

quantity of matter composing a body ( kg)

Question 28

what is weight

Answer 28

attractive force that earth exerts on the body ( w=mg, N)

***mass wont change but the weight will change depending on where you are

Question 29

What is the center of gravity?

Answer 29

point aroudn which a bodys weight is equally balanced in all direction

Question 30

what is pressure and stress

Answer 30

force per unit of area over which the force acts (N/m^2)

– can be calculated as F/A

Question 31

What are some of the transverse plane movements

Answer 31

medial rotation 
lateral rotations
pronation
supination 
horizontal adduction
horizontal abduction

Question 32

What is the stress

Answer 32

stress= F/A in (N/m^2) or keep it in whatever the units come in

Question 33

Look at the pressure/ stress equation

Answer 33

you will need to use % when talking about joint and pressure as they dont hold the whole body only a certain number!!