Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PE - anatomy + physiology > Biomechanics key terms > Flashcards

Biomechanics key terms Flashcards

1
Q

Angular momentum

A

the quantity of rotation a body possesses, and is a product of inertia and angular velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Moment of inertia

A

the body’s reluctance to rotate/ alter its rate of rotation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Angular velocity

A

The rate of rotation of a body around its axes of rotation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Angular acceleration

A

The rate of change of angular velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Angular displacement

A

the smallest change in angle between starting and finishing point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Principle of conservation

A

states that angular momentum remains constant, if moment of inertia decreases, angular velocity increases visa versa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Angular momentum equation

A

angular momentum = moment of inertia x angular velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Angular velocity equation

A

Angular velocity = angular displacement /time taken

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Angular acceleration equation

A

angular acceleration = change in angular velocity / time taken

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How do you calculate angular displacement?

A

1 radian = 57.3 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Fluid mechanics

A

Study of an object as it moves through liquid/gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Surface drag

A

friction between the surface of an object and the environment (e.g shaving legs)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Form drag

A

impact of the fluid environment on the object (e.g streamline)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Projectile motion

A

refers to the movement of either an object or human body through air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Parabola

A

uniform curve that is symmetrical at its highest point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Impulse

A

change in momentum of object when the object is acted upon by a force for a period of time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Impulse equation

A

impulse = force x time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the Bernoulli principle?

A

covers lift force and downward force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Law of Inertia (1)

A

the resistance an object has to change in its state of motion
- object will remain stationary until force is applied to it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Law of acceleration (2)

A

size and direction of the force applied is directly proportional to the force causing change
force = mass x acceleration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Law of action/ reaction (3)

A

to every action there is an opposite and equal force
e.g ground reaction force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Speed

A

rate of change of position

23
Q

Distance

A

length of path a body follows when moving from 1 position to another
distance = speed x time

24
Q

Centre of mass

A

point of concentration of the mass/ point of balance of the body

25
Q

External forces

A

forces from outside the body

26
Q

Internal forces

A

Forces from within the body
(e.g muscle contractions)

27
Q

Static friction

A

force exerted on 1 surface by another when there is no motion between the two surfaces

28
Q

Sliding friction

A

occurs when dry friction acts between 2 surfaces that are moving relative to each other

29
Q

Angular motion

A

occurs as a result of torque.

30
Q

Torque

A

rotational consequence as a result of force
torque (Nm) = size of force x moment arm

31
Q

Moment arm

A

perpendicular distance from fulcrum to where force is applied
(larger the distance the larger the torque)

32
Q

Linear motion

A

motion in a straight line or curved line, with all body parts moving in the same direction at the same speed and same distance

33
Q

First class lever

A

Fulcrum is positioned between the effort and resistance (load)

34
Q

Second class lever

A

Load between fulcrum and effort

35
Q

Third class lever

A

Effort between fulcrum and load

36
Q

First class lever example

A

Extension at elbow

37
Q

Second class lever example

A

Plantar flexion

38
Q

Third class lever example

A

Flexion at elbow

39
Q

Mass

A

quantity of matter in the body (kg)

40
Q

Weight

A

the gravitational force exerted on an object (N)

41
Q

Velocity

A

rate of change of displacement (m/s)

42
Q

Acceleration

A

the rate of change of velocity (m/s squared)

43
Q

Momentum

A

the product of the mass and velocity of an object (Kgm/s)

44
Q

Friction can be affected by:

A

surface characteristics
temperature of surfaces
mass of objects that are sliding

45
Q

Air resistance

A

opposes the motion of an objects that move through air

46
Q

Air resistance is affected by

A

velocity
shape and characteristics of moving body
cross-sectional area of the moving body

47
Q

Impulses can be increased by:

A

less time, more force
An increase in impulse will result in an increase in the rate of momentum, causing changes to velocity. Therefore impulse is equivalent to a change in momentum of a body as a result of a force acting upon it

48
Q

Horizontal displacement

A

the shortest distance from starting point to the finishing point in a line parallel to the ground

49
Q

If landing height is higher than release height what is the optimum release point?

A

optimum release point is above 45 degree

50
Q

If release height and landing height are the same what is optimum release point?

A

optimum release point is equal to 45 degrees

51
Q

if release height is higher than landing height what is optimum release point?

A

optimum release point is below 45 degrees

52
Q

Factors affecting horizontal displacement:

A

angle of release
speed of release (greater the release velocity - greater the horizontal displacement)
height of release (greater the release height = increase in horizontal displacement)

53
Q

Factors reducing drag:

A
  • Velocity of moving body
  • Cross-sectional area of moving body
  • Shape and surface
  • Characteristics of the moving body
54
Q

Factors affecting stability:

A

Height of centre of mass
Area of base of support
Position of line of gravity
Body mass

PE - anatomy + physiology (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions