Biomechanics

Question 1

definition of a force

Answer 1

a push or pall that tends to alter the state of a body
if forces work together the effect is combined
if act against it has a cancelling effect

Question 2

what forces act on a body

Answer 2

• vertical force
• gravity
• reaction

Question 3

what is the calculation for force and measurements

Answer 3

mass x acceleration

newtons

Question 4

what is the calculation for momentum

Answer 4

mass x velocity

kgm/s

Question 5

what is the calculation for acceleration

Answer 5

F ( change in velocity)/ Mass

m/s2

Question 6

what is the calculation for weight

Answer 6

M x A due to gravity

newtons

Question 7

what is displacement

Answer 7

the shortest straight line route between two positions

Question 8

what is velocity

Answer 8

the rate of change of displacement / speed in a given direction

Question 9

what is the calculation for velocity for linear motion

Answer 9

displacement / time

m/s

Question 10

what is the calculation for acceleration for linear motion

Answer 10

change in velocity / time

(v-u)/t

Question 11

definition of the effort arm

Answer 11

the distance between the effort and fulcrum

Question 12

example of a class 2 lever- plantar flexion

Answer 12

fulcrum- ball of foot
load- body weight
effort- gastrocnemius

Question 13

what is moment of inertia- angular motion

Answer 13

reluctance of a body to change its state of angular motion

Question 14

what does moment of inertia depend upon

Answer 14

mass and disruption of mass about the axis of rotation

Question 15

what can be changed easily if moment of inertia is small

Answer 15

angular motion

Question 16

calculation for angular momentum

Answer 16

moment of inertia x velocity

Question 17

in the take of phase of a triple Axel spin moment of inertia will be

Answer 17

high and angular velocity low as they are travelling linearly