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PE: Unit 3 > AOS 1: Biomechanics > Flashcards

AOS 1: Biomechanics Flashcards

1
Q

General motion definition

A

A combination of linear and angular motion

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2
Q

Linear motion definition

A

Body parts move at the same speed in the same direction

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3
Q

Angular motion definition

A

movement around a central axis

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4
Q

Rectilinear motion definition

A

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

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5
Q

Curvilinear motion definition

A

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

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6
Q

Distance definition

A

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

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7
Q

Displacement definition

A

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

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8
Q

Speed definition

A

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

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9
Q

Velocity definition

A

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

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10
Q

Acceleration definition

A

Change in velocity/speed over a period of time

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11
Q

Positive acceleration definition

A

The ability to speed up

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12
Q

Negative acceleration definition

A

The ability to slow down

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13
Q

Torque definition

A

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

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14
Q

Angular speed definition

A

Rate of change of the angular speed

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15
Q

Angular velocity

A

rate of change of the angular displacement

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16
Q

Projectile definition

A

any airborne object

17
Q

factors affecting path of a projectile examples

A

Height of release, angle of release, speed of release

18
Q

Force definition

A

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

19
Q

Friction

A

Occurs when two surfaces contract each other, opposes motion

20
Q

Inertia definition

A

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

21
Q

Momentum definition

A

the measure of the amount of motion in an object

22
Q

Summation of momentum

A

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

23
Q

Impulse

A

The change in momentum of an object

24
Q

Newtons law of inertia motion

A

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

25
Q

Newtons law of acceleration

A

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

26
Q

Newton’s law of Reaction motion

A

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

27
Q

Angular momentum

A

the amount of angular motion possessed by a body

28
Q

Principles of equilibrium

A

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

29
Q

Static equilibrium

A

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

30
Q

Stability definition

A

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

31
Q

Balance defintion

A

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

32
Q

Dynamic equilibrium

A

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

33
Q

Factors affecting stability

A

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

34
Q

maximising stability examples

A

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

35
Q

Lever definition

A

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

36
Q

First-class lever

A

Axis is between the resistance and the force

37
Q

Second class lever

A

Resistance is between the axis and the force

38
Q

Third class levers

A

Force is between the axis and the resistance

PE: Unit 3 (3 decks)

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