Year 9 Science · Unit 4 · Lesson 14
Foundation Worksheet
Learning Goals
Match each speed-time graph feature to its description
Draw a line connecting each graph feature on the left to its correct description on the right. Or write the matching letter next to each feature.
| Speed-time graph feature | Your answer | What it describes |
|---|---|---|
| Rising straight line | A. Distance travelled — the area under the graph | |
| Horizontal flat line | B. Deceleration — slowing down at a steady rate | |
| Falling straight line | C. Constant speed — zero acceleration | |
| Steeply rising line | D. Acceleration — speeding up at a steady rate | |
| Area under the line | E. Large acceleration — speed increases quickly |
True or False? Fix the false ones
Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.
The gradient of a speed-time graph equals the distance travelled.
Correct it:
A horizontal line on a speed-time graph means the object is stationary.
Correct it:
Deceleration appears as a falling line on a speed-time graph.
Correct it:
Acceleration is measured in units of m/s (metres per second).
Correct it:
1. A car is travelling at 60 km/h on a highway. Its speed-time graph shows a horizontal flat line. What is the car's acceleration? Explain your reasoning.
2. Describe how you could find the distance travelled during a journey using only a speed-time graph. What part of the graph do you need to look at?
Wrap Up
In one sentence, what was the main idea of this lesson?