Edexcel IGCSE Maths 复习笔记 3.3.2 Speed-Time Graphs
What is a speed-time graph?
- Speed-time graphs show speed at different times
- Speed is on the vertical axis, and time is on the horizontal axis.
- The gradient of the graph is the acceleration:Acceleration = RISE / RUN = SPEED / TIMEArea under graph = Distance covered
Horizontal line = Constant speed (so zero acceleration)
It is easy to get confused between different types of graph.
Look at the label on the vertical axis to make sure you are looking at a SPEED-time graph (not distance-time).