biomechanics

Question 1

inertia

Answer 1

is the resistance of a body/object to a change in its state of angular force

Question 2

angular momentum

Answer 2

is the rotational motion possessed by an object. angular momentum of a body/object will remain at constant unless an external force is acted upon it

Question 3

first class lever

Answer 3

fulcrum between force and resistance arm

Question 3

second class lever

Answer 3

resistance between fulcrum and force

Question 3

third class lever

Answer 3

force between fulcrum and resistance

Question 4

factors affecting levers

Answer 4

length of lever, inertia of the lever, amount of force

Question 5

newtons first law

Answer 5

states that an object will remain at rest unless acted on by an external force

Question 6

newtons third law

Answer 6

states that for every action there will be an equal and opposite action

Question 7

newtons second law

Answer 7

states that objects acceleration is directly proportional to the force acting upon it and is indirectly proportional to its mass (F=MxA)

Question 8

force-motion

Answer 8

relates to the magnitude of the force and the direction of the force applied

Question 9

impulse momentum (force-time)

Answer 9

impulse is the change in momentum (Impulse=FxT)

Question 10

coefficient of restitution

Answer 10

refers to the elasticity of an object, it determines the measure of momentum that is conserved

Question 11

factors that affect cor

Answer 11

materials of interacting surface, velocity of collision, temperature of materials

Question 12

torque

Answer 12

force that produces a rotational movement around an axis point from an eccentric force

Question 13

segmental interaction

Answer 13

transfer of energy or momentum between body parts. it is the way the body segments interact to meet the demands of the task

Question 14

6 points for segmental interaction

Answer 14

body parts move in a sequence to generate the largest force or acceleration possible
movement starts with largest, strongest and slowest segments, working through to the smallest and fastest, resulting in summation of momentum
next segment begins to move as the preceding segment has reached maximum velocity
body needs to be well balanced to aid the transfer of momentum across body segments
follow through is important to prevent deceleration of last segment and safe dissipation of force
all forces are directed to the target

Question 15

coordination contiuum

Answer 15

is the sequencing approach to develop motion

Question 16

range of motion

Answer 16

the degree at which a body segment moves around a joint while in motion

Question 17

balance

Answer 17

the ability of something to maintain or hold its position

Question 18

increase balance

Answer 18

base of support
increase surface area
lower centre of gravity
maintain line of gravity in middle of base support

Question 19

optimal projection

Answer 19

height of release, projection angle, velocity or release