The diagram shows the speed-time graph for 100 seconds of the journey of a car and of a motorbike. Find the deceleration of the car between 60 and 100 seconds.

E2.10.1 Interpret and use graphs in practical situations including travel graphs and conversion graphs.

E2.10.2 Draw graphs from given data.

E2.10.3 Apply the idea of rate of change to simple kinematics involving distance–time and speed–time graphs, acceleration and deceleration. (May include estimation and interpretation of the gradient of a tangent at a point.)

E2.10.4 Calculate distance travelled as area under a speed–time graph.