1. Velocity-time graph’s
Speed and Velocity
Speed
Velocity
Velocity-time graph’s
Questions

2. Velocity-time graph’s
Speed
Speed tells you how far an object has moved in a curtain time, for example,
If your going 20km/h you will travel:
20km in an hour
10km in 30 minutes
Speed
Velocity
Velocity-time graph’s
Questions

3. Velocity-time graph’s
Speed
To work out average speed we use the formula:
𝑠= 𝑑 𝑡
S= speed (m/s)
D= distance (m)
T= time (s)
Speed
Velocity
Velocity-time graph’s
Questions

4. Velocity-time graph’s
Speed
Using the formula, 𝑠= 𝑑 𝑡 we can also calculate distance and time.
𝑑=𝑠×𝑡
𝑡= 𝑑 𝑠
Speed
Velocity
Velocity-time graph’s
Questions

5. Velocity-time graph’s
Velocity is the same as speed but it has a direction, for example:
These cars have the same speed but different velocity's as they are traveling in different directions.
Speed
Velocity
Velocity-time graph’s
Questions
20km/h
20km/h

6. Velocity-time graph’s
Distance-time graph
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Speed
Velocity
Velocity-time graph’s
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Distance (m)
Time(s)
This graph shows us - 1) How far something has travelled
- 2) How long it took to travel that distance

7. Velocity-time graph’s
Distance-time graph
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Speed
Velocity
Velocity-time graph’s
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Distance (m)
Time(s)
Using the 2 things that the graph shows us we can calculate speed. We do this using the gradient: 𝑠=
𝑠= 𝑑 𝑡
=10m/s

8. Velocity-time graph’s
Question time
What is the difference between speed and velocity?
If a car is traveling at 80km/h, how far will it get it 45 minuets?
If a car goes round a corner at a constant speed why is its velocity still changing?
Speed
Velocity
Velocity-time graph’s
Questions