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
1. 20km/h
Velocity
1. Velocity tells us how fast and in which direction an object is moving
  1. e.g 20km/h northwards
Distance Time graphs
1. When an object is stationary, the line on the graph is horizontal
2. When an object is moving at a steady speed, the line on the graph is straight, but diagonal.
3. Note that the steeper the line, the greater the speed of the object.
4. yaxis = distance
5. x axis = time
Measures of speed
1. m/h
  1. Miles per hour
2. km/h
  1. Kilometres per hour
3. m/s
  1. Metres per second
Speed Time graphs
1. When an object is moving with a constant speed, the line on the graph is horizontal.
2. When an object is moving with a constant acceleration, the line on the graph is straight, but diagonal.
3. When an object is moving with a constant deceleration, the line on the graph is straight, but diagonal (sloping down).
4. y axis = speed
5. x axis= time

Resource summary

	Created by Emma Boxley over 11 years ago