1. Created by Mrs. Bertoson Feb 2012
Speed vs Time Graphs
Created by Mrs. Bertoson
Feb 2012

2. How to read the speed vs time graph
The slope is acceleration (changing speed)
Horizontal lines are constant speed
Horizontal lines on the O are stopped
Diagonal lines are changing speed

3. The speed is 4 m/s How to find speed Find the speed at 4 seconds.
Find 4 seconds on the x-axis and follow it vertically until you reach the graph.
From this point, find the y-value (speed) by looking to the left.
The speed is 4 m/s

4. Practice finding speed
Find the speed at 0.25 seconds.
Find 0.25 seconds on the x-axis and follow it vertically until you reach the graph.
From this point, find the y-value (speed) by looking to the left.
The speed is 250 cm/s

5. How to find distance Plug in the numbers: distance= speed x time
Find the distance travelled after 4 seconds.
Find 4 seconds on the x-axis and follow it vertically until you reach the graph.
From this point, find the y-value (speed) by looking to the left.
Plug in the numbers: distance= speed x time
distance= 4s x 4 m/s = 16 m

6. Practice finding distance
Find the distance travelled after 10 seconds.
Find 10 seconds on the x-axis and follow it vertically until you reach the graph.
From this point, find the y-value (speed) by looking to the left.
Plug in the numbers: distance= speed x time
distance= 10s x 7 m/s = 70 m