final

Question 1

what does the coefficient of friction represent

Answer 1

ratio of the frictional force resisting the motion of two surfaces in contact to the normal force pressing the two surfaces together.

Question 2

what is an anatomical angle

Answer 2

The angle between two segments relative to the anatomical position.

Question 3

define instaneous velocity

Answer 3

slope of red line determines instantaneous velocity

Question 4

what is gait?

Answer 4

purpose is to get from one point to the next
major motor functions
- maintenance of support of the upper body
- maintenance of upright posture and balance of HAT
-control of foot trajectory for ground clearance and gentle heel/toe landing
- generation of mechanical energy to maintain velocity
- absorption of mechanical energy for shock absorption and stability or to decrease velocity

Question 5

define stride length

Answer 5

distance between successive points of initial contact of the same foot

Question 6

define step length

Answer 6

distance between the point of initial contact of one foot and the point of initial contact of the opposite foot

Question 7

define step width

Answer 7

lateral distance between successive points of opposite feet

Question 8

define foot angle

Answer 8

describes an angle between the line of progression and a one drawn between the midpoints of the calcaneus and the second metatarsal head

Question 9

centre of mass

Answer 9

considered the point about which the body is evenly distributed

Question 10

what do we use free body diagrams for?

Answer 10

the link between the complexity of the human situation and the application of techniques of mechanics