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Biomechanics > Kinematics > Flashcards

Kinematics Flashcards

1
Q

What is kinematics?

A

Spatial and Temporal components of motion

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2
Q

What does kinematics analyse?

A

Temporal characteristics
Position
Velocity
Acceleration

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3
Q

Does it take forces into account?

A

NO

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4
Q

What are the 2 Measures used?

A

Scalar and Vector

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5
Q

What are scalars?

A

Quantites described by amount or volume: ie. Mass, Distance and Volume

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6
Q

What are vectors?

A

Cannot be described by just magnitude

Include direction

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7
Q

What is temporal analysis?

A

Running time or duration of a phase of something

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8
Q

What is distance?

A

Scalar quantity

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9
Q

What is displacement?

A

A vector quantity,

Measured in a straight line from where they began to where the finish

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10
Q

If an athlete runs 400m what is the distance and what is the displacement?

A

Distance: 400m
Displacement: 0

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11
Q

How is speed worked out?

A

Rate of change= Distance covered/Time taken

S=D/T

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12
Q

How is velocity worked out?

A

Rate of change of displacement = Displacemet/Time

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13
Q

What units are velocity and speed measured in?

A

m/s

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14
Q

What is acceleration?

A

The rate of change of velocity with respect to time

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15
Q

How is average acceleration worked out?

A

Avg Acceleration: Change in velocity/Time taken

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16
Q 
What is 
Vi
Vf 
Ti
Tf
A

Initial velocity
Final velocity
Initial time
Final time

17
Q

What units is acceleration measured in?

A

m/s/s

18
Q

What are the 3 possible scenarios in terms of acceleration?

A

vf>vi Positive acceleration
vf=vi No change in acceleration
vf

19
Q

What is the difference between a step and a stride?

A 
Step = LF to RF
Stride = LF to RF to LF
20
Q

How is velocity in terms of steps worked out?

A

Step length x Step frequency

21
Q

How is angular position and displacement quantified?

A

Using circles,

Degrees/Radians

22
Q

How many degrees in a circle?

A

360

23
Q

What is 1 rev?

A

1 circle

24
Q

How much is 1 radian worth?

A

57.3

25
Q

What is angluar distance?

A

Sum of the angles through the passage of intial to final position

26
Q

Is angular distance a vector or scalar quantity?

A

Scalar

27
Q

What is angular displacement?

A

The difference between the initial and final position of the rotating object

28
Q

Is angular displacement a vector or scalar quantity?

A

Vector

29
Q

How is average angular speed worked out?

A

Change in angular distance/Time taken

30
Q

How is average angular velocity worked out?

A

Change in angular displacement/Time taken

31
Q

What units is this displayed in?

A

s. -1,

rad. s-1

32
Q

How is average angular acceleration worked out?

A

Change in angular velocity/Time taken

33
Q

When a point travels in a circle what components of movement are involved?

A

Radial and Tangential

The tangential is perpendicular to the radial

Biomechanics (5 decks)

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