WEEK 3

Question 1

define kinematics

Answer 1

studies the description of motion

• describes how the velocity and acceleration of a body can change with time and changes with the position of the body

Question 2

describe linear motion (x3)

Answer 2

• all parts of the body show the same trajectory
• results in a translation of a body
• rectilinear and curvilinear

Question 3

what is angular motion

Answer 3

rotation around a point/ axis

Question 4

define general motion

Answer 4

combination of linear and angular motion

Question 5

describe the anatomical reference system (x5)

Answer 5

• erect standing position
• feet slightly seperated
• arms hanging relaxed at the sides
• palms of the hands facing forward

Question 6

what is anterior

Answer 6

moving towards the front

Question 7

define posterior

Answer 7

towards the back

Question 8

define superior

Answer 8

towards the top of the body

Question 9

define inferior

Answer 9

towards the bottom

Question 10

defne lateral

Answer 10

away from the midline

Question 11

define medial

Answer 11

toward the midline

Question 12

define sagittal plane

Answer 12

cuts through the left side of the body and right side

• perpendicular to the medial lateral axis

Question 13

define frontal plane

Answer 13

cuts off the front and back of the body

• perpendicular to the anterior posterior axis v

Question 14

define transverse plane

Answer 14

cuts off the top and bottom of the body

• perpendicular to vertical axis

Question 15

what 3 movements can be done in the saggital plane

Answer 15

• flexion
• extension
• hyper extension

Question 16

identify the two movements with the frontal plane

Answer 16

• abduction
• adduction

Question 17

define the complex joint motion arm circumductin

Answer 17

combination of flexion, extension, abduction and adduction

Question 18

define complex joint motion rear foot

Answer 18

combination of inversion, adduction and plantar flexion at the sub talar joint

Question 19

define distance

Answer 19

the length of the path followed

Question 20

define displacement

Answer 20

the magnitude of the vector joining the initial and final points of the path followed

Question 21

define speed

Answer 21

change in distance during a certain period

Question 22

define velocity

Answer 22

change in displacement during a certain period of time

Question 23

identify the linear velocity equation

Answer 23

position 2 - position 1 / time at 2- time at 1

units = metres per second

Question 24

define acceleration

Answer 24

defined as how much velocity is changing every second

Question 25

identify the acceleration equation

Answer 25

velocity 2 - velocity 1 / time 2- time 1

Question 26

describe how to identify measurements when plotting curves

Answer 26

the area above the graph tells us about the magnitude of the curve below - you MUST start with acceleration at the top

Question 27

what are the 3 equations for constant acceleration

Answer 27

1) vf ( final velocity ) = vi ( initial velocity + a ( acceleration x t ( time) 2) s ( displacement)= initial velocity x time + 1/2 x acceleration x time squared 3) final velocity ^2= initial velocity ^2 + 2 x acceleration x displacement

Question 28

define projectile motion

Answer 28

any object projected into the air. a projectile is a body in free fall that is subject only to the forces of gravity and air resistance. eg a ball

Question 29

what is the number of gravity

Answer 29

-9.81 metres per second

Question 30

how do you calculate gait based off step frequency

Answer 30

1 step divided by step time (s)

Question 31

how do you calculate gait cycle through velocity

Answer 31

step length (m) divided by step time (s)

Question 32

how do you calculate swim velocity

Answer 32

stroke length x stroke frequency