The speed-time graph in the question below shows how the speed of a bus changes during part of a journey. b) At what time during the journey did the bus reach its greatest speed? c) How long did the ...

One of the most basic things students do in a physics lab is to collect data and use that to build a model. Most of these models come in the form of a mathematical function. But here is the problem.

When a relationship between two variables is defined by a curve it means that the gradient, or rate of change, is always varying. An average speed for a journey can be found from a distance-time graph ...