Idea 1of 6Builds onSteep means fastThe area under the line
Two readings of any graph
What can a graph of motion tell you?
Today you'll discover
- the two things every motion graph can answer
- which reading goes with which graph
- why the equations are those readings written down
Think firstA velocity–time line. Which reading says how far?
On this velocity–time graph, which reading tells you how far the cart went?
Decide first, then press Next. Watch which reading each graph uses.
Amara's position–time graph with both legs. After a prediction, a shaded triangle under the first leg, 1.5 metres per second. Then her velocity–time graph with the two areas hatched. Then both readings named. The last step shows a tram's velocity–time line falling steadily and asks what its slope tells you.
See the whole ideathe big idea and the key word, in one place
The big idea
Slope: how fast it changes. Area: how much adds up.
Where it goes nextEvery equation in this topic is one of these readings written down. Read the graph fluently and nothing needs memorising.
About this modelBelow the line means moving the other way, not slowing down.
Below the line means moving the other way, not slowing down.
Ready to use it?
- Say which reading of a graph answers a question.