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A-Level PE Anatomy And Physiology > Linear Motion > Flashcards

Flashcards in Linear Motion Deck (23)
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1

Define linear motion

Motion in a straight or curved line with all body parts moving at the same speed in the same direction at the same time (eg - skiing)

2

How is linear motion created

Linear motion is created by a direct force which is passed through the centre of mass of the body

3

Define distance and what its measured in

1. The length of the path taken by a body moving from one position to another
2. Measured in metres (m)

4

Define displacement and what it is measured in

1. The shortest straight line route between two positions
2. Measured in metres (m)

5

Define speed and what is it measured in

1. The movement of a body per unit of time (no reference to direction)
2. Measured in metres per second (m/s)

6

What is the calculation for speed

Speed = distance / time

7

Define velocity and what it is measured in

1. The rate of change in displacement
2. Measured in metres per second (m/s)

8

How do you work out velocity

Velocity = displacement / time

9

Define acceleration/deceleration and what it is measured in

1. The rate of change in velocity
2. Measured in metres per second squared (m/s^2)

10

What is the calculation for acceleration/deceleration

Change in velocity / time taken

11

On a distance time graph, what does a horizontal line show

A stationary body

12

On a distance time graph, what does a straight line with a positive gradient show

Constant velocity

13

On a distance time graph, what does a curved line with a decreasing gradient show

A decrease in speed

14

On a distance time graph, what does a curved line with an increasing gradient show

Increasing speed

15

Which axis does time go on velocity time and distance time graphs

Speed goes along the x axis

16

On a distance time graph, which axis does distance go on

Distance goes on the y axis

17

On a speed/velocity time graph, which axis does speed go on

Speed goes on the y axis

18

On a speed/velocity time graph, what does a line with no gradient show

Constant speed

19

On a speed/velocity time graph, what does a line with a positive gradient show

Acceleration

20

On a speed/velocity time graph, what does a strength line with a decreasing gradient show

Deceleration

21

On a speed/velocity time graph, what does a line with a positive to no gradient line show

Acceleration to a constant speed

22

On a velocity time graph, what does a line with an increasing negative velocity show (below 0)

Acceleration in a different direction

23

On a velocity time graph, what does a line with a decreasing negative velocity show (below 0)

Deceleration in the opposite direction

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