- Remind pupils of measurements of speed they made earlier, or work with pupils to make measurements of the time taken for toy cars to roll down a ramp. Discuss with pupils what the values mean and whether the car is travelling at the same speed at each point. Introduce the term 'accelerate', to be used qualitatively.
- Demonstrate how a computer-connected light gate can measure the speed of the car. Ask groups of pupils to plan and make measurements of the car's speed at a number of points on the slope, to consider reasons for variations in the readings, to make predictions about how increasing the steepness of the slope or mass of the car would affect the results obtained, and to test these predictions. Use ICT to display pupils' results and ask pupils to describe the pattern and make a generalisation about the relationship shown.
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- contribute to a group plan
- identify the difference between average speed and speed at a point
- collect readings of speed at a point using datalogging equipment
- describe the pattern in results,
eg the higher the ramp, the faster the car at the bottom; the car accelerates down the slope
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