AOS 1: Biomechanics

Question 1

General motion definition

Answer 1

A combination of linear and angular motion

Question 2

Linear motion definition

Answer 2

Body parts move at the same speed in the same direction

Question 3

Angular motion definition

Answer 3

movement around a central axis

Question 4

Rectilinear motion definition

Answer 4

All body parts move at the same speed in the same direction on a linear path

Question 5

Curvilinear motion definition

Answer 5

All body parts move at the same speed in the same direction on a curved path

Question 6

Distance definition

Answer 6

The path travelled by an object from start to finish, regardless of the direction travelled

Question 7

Displacement definition

Answer 7

Change in position of an object from the starting position relative to the finishing position

Question 8

Speed definition

Answer 8

Time taken to cover a certain distance (measured in m/s)

Question 9

Velocity definition

Answer 9

Time taken to change position (measured in m/s)

Question 10

Acceleration definition

Answer 10

Change in velocity/speed over a period of time

Question 11

Positive acceleration definition

Answer 11

The ability to speed up

Question 12

Negative acceleration definition

Answer 12

The ability to slow down

Question 13

Torque definition

Answer 13

the force that causes rotation around an axis, dependent on the force applied and the distance it’s applied at

Question 14

Angular speed definition

Answer 14

Rate of change of the angular speed

Question 15

Angular velocity

Answer 15

rate of change of the angular displacement

Question 16

Projectile definition

Answer 16

any airborne object

Question 17

factors affecting path of a projectile examples

Answer 17

Height of release, angle of release, speed of release

Question 18

Force definition

Answer 18

a push or pull on an object or body that causes an object to change shape, direction or speed

Question 19

Friction

Answer 19

Occurs when two surfaces contract each other, opposes motion

Question 20

Inertia definition

Answer 20

an objects resistance to change in its state of motion, the greater the mass of an object the greater its inertia

Question 21

Momentum definition

Answer 21

the measure of the amount of motion in an object

Question 22

Summation of momentum

Answer 22

Refers to the correct timing and sequencing of body segments to produce maximal force

Question 23

Impulse

Answer 23

The change in momentum of an object

Question 24

Newtons law of inertia motion

Answer 24

An object will remain at rest or in constant motion unless acted upon by an external force

Question 25

Newtons law of acceleration

Answer 25

a force applied to an object will produce acceleration in the direction applied, that is directly proportional to the size of the force and inversely proportional to its mass

Question 26

Newton's law of Reaction motion

Answer 26

For every action, there is an equal and opposite reaction force

Question 27

Angular momentum

Answer 27

the amount of angular motion possessed by a body

Question 28

Principles of equilibrium

Answer 28

Balance, stability, friction, mass, base support and centre of gravity

Question 29

Static equilibrium

Answer 29

a body that is not moving or rotating, sum of all forces is 0

Question 30

Stability definition

Answer 30

the resistance to the disruption of equilibrium, greater the stability the harder it is to unbalance

Question 31

Balance defintion

Answer 31

The ability to control equilibrium, strength and flexibility contribute to good balance

Question 32

Dynamic equilibrium

Answer 32

A body that is not moving with a constant velocity, no change in direction or speed

Question 33

Factors affecting stability

Answer 33

Base of support, centre of gravity, body mass and friction

Question 34

maximising stability examples

Answer 34

Increasing the base of support, lowering the centre of gravity, increasing mass, increasing friction

Question 35

Lever definition

Answer 35

A rigid bar that allows the application of increased force and or speed

Question 36

First-class lever

Answer 36

Axis is between the resistance and the force

Question 37

Second class lever

Answer 37

Resistance is between the axis and the force

Question 38

Third class levers

Answer 38

Force is between the axis and the resistance