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76997
Speed and Velocity
Description
AQA IGCSE Physics (EOY exams yr 8) Mind Map on Speed and Velocity, created by Emma Boxley on 08/05/2013.
No tags specified
eoy exams yr 8
physics
physics
eoy exams yr 8
aqa igcse
Mind Map by
Emma Boxley
, updated more than 1 year ago
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Created by
Emma Boxley
over 11 years ago
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Resource summary
Speed and Velocity
Speed = distance/Time
If an object is speeding up it is accelerating
If an object is slowing down it is decelerating
A speed tells us how fast an object is moving
20km/h
Velocity
Velocity tells us how fast and in which direction an object is moving
e.g 20km/h northwards
Distance Time graphs
When an object is stationary, the line on the graph is horizontal
When an object is moving at a steady speed, the line on the graph is straight, but diagonal.
Note that the steeper the line, the greater the speed of the object.
yaxis = distance
x axis = time
Measures of speed
m/h
Miles per hour
km/h
Kilometres per hour
m/s
Metres per second
Speed Time graphs
When an object is moving with a constant speed, the line on the graph is horizontal.
When an object is moving with a constant acceleration, the line on the graph is straight, but diagonal.
When an object is moving with a constant deceleration, the line on the graph is straight, but diagonal (sloping down).
y axis = speed
x axis= time
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