Section A - Mechanical Factors Affecting S And P

Question 1

Mechanical factors affecting strength and power generation

Answer 1

Joint angle
Joint velocity
Muscle action 
Moment arm (mechanical advantage and disadvantage)
Length and velocity of isolated muscle

Question 2

Neural factors affecting strength and power generation

Answer 2

Num and size of motor units activated
Frequency of stimulation
Muscular co-ordination 
Co-contractions 
Synchronisation of motor unit firing

Question 3

Architectural/ structural factors affecting strength and power generation

Answer 3

Pennation angle
Fibre length
Fibre arrangement (in series vs in parallel)
Motor unit types (fibre distribution)
Innervation ratio 
Cross sectional ratio (PSCA & ASCA)

Question 4

Variables measured to quantify mechanical responses

Answer 4

Kinetic and kinematic

Question 5

Vertical plane passing from posterior to anterior? Movement around which axis?

Answer 5

Saggittal plane

Frontal

Question 6

Vertical plane passes from right to left? Movement around which axis?

Answer 6

Frontal plane

Saggital axis

Question 7

Plane that divides the body into superior and inferior halves? Movement around which axis?

Answer 7

Horizontal plane

Vertical axis

Question 8

The point through which the mass of the body can be considered to act

Answer 8

Centre of mass

Question 9

Variables that describe an objects motion? Examples?

Answer 9

Kinematic

Displacement and velocity

Question 10

Variables which cause an object to change its state of motion? Examples?

Answer 10

Kinetic variables

Force and power

Question 11

What had magnitude and direction?

Answer 11

Vectors

Question 12

The rate of change in distance is?

Answer 12

Speed

Question 13

What is the formula for speed and what is it measured in?

Answer 13

Speed= distance / time taken
Metres per second m/s
Symbol is s

Question 14

What is the rate of change of displacement?

Answer 14

Velocity

Question 15

What is the equation for velocity and what is it measured in?

Answer 15

Velocity= displacement / time taken

Metres per second

Question 16

What is the rate of change of velocity?

Answer 16

Acceleration

Question 17

What is the equation for acceleration and what is it measured in?

Answer 17

Acceleration= change in velocity/ time taken

Metres per second per second (m/s2)

Question 18

What causes or tends to cause acceleration

Answer 18

Force

Question 19

What is the magnitude of force multiplied by the velocity of motion? Unit of measurement?

Answer 19

Power

Watts

Question 20

What is the magnitude of a force multiplied by the mass of an object? Unit of measurement?

Answer 20

Momentum

Kg.m/s

Question 21

What is the force applied over a particular distance? Unit of measurement?

Answer 21

Work

Joules or newton metres

Question 22

What acts whenever one body moves against the surface of another body

Answer 22

Friction

Question 23

The product of force and the time over which force acts? Unit of measurement?

Answer 23

Impulse

Ns

Question 24

The reluctance of a body to change its state of being

Answer 24

Inertia

Mass is a measure of inertia

Question 25

An objects mass multiplied by gravity? Unit of measurement?

Answer 25

Weight | Newton’s (N)

Question 26

Motion that states that a body will continue in its state of motion unless acted on?

Answer 26

Newton’s first law

Question 27

A motion states that the rate of change of momentum is proportional to the force causing it and in that direction?

Answer 27

Newton’s second law

Question 28

For every action there is an equal and opposite reaction?

Answer 28

Newton’s third law

Question 29

The capacity to do work? | Unit of measurement?

Answer 29

Energy | Joules

Question 30

The magnitude of the force multiplied by the perpendicular distance between the line of action and the axis?

Answer 30

Torque | Of movement or force

Question 31

What has the pivot in between the load and the effort?

Answer 31

A first class lever

Question 32

What has the load between the pivot and the resistance?

Answer 32

A second class lever

Question 33

What has the effort between the pivot and the load?

Answer 33

A third class lever

Question 34

What is the angle an object moves through between a starting and finishing point. Unit of measurement?

Answer 34

Angular displacement | Degrees or radians

Question 35

The rate of change in angular displacement? Symbol?

Answer 35

Angular velocity | W

Question 36

The rate of change of angular velocity? Symbol?

Answer 36

Angular acceleration | Weird a

Question 37

The position of body mass relative to the rotating axis, and is a measure of the resistance of the body to angular acceleration?

Answer 37

Moment of inertia | Lower the moment of inertia, the quicker the body will spin about the axis

Question 38

Vertical and passes from right to left? Movement around which axis?

Answer 38

Frontal plane | Sagittal

Question 39

Divides the body into superior and inferior halves? Movement around which axis?

Answer 39

Horizontal plane | Vertical axis

Question 40

The point through which the mass of the body can be considered to act

Answer 40

Centre of mass

Question 41

What describes an objects motion? Give examples

Answer 41

Kinematic - describes an objects motion | •displacement, velocity, acceleration

Question 42

Variables that cause object to change its state of motion? Examples?

Answer 42

Kinetic - variables that cause object to change its state of motion •force, torque, power, work, impulse