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
