1. Acceleration What does the word “acceleration” mean? The change in velocity each second.

2. Acceleration How many speeds ( or “velocities”) would you need to have to work out an acceleration? 2

3. Acceleration What words mean “the speed at a moment in time”? Instantaneous Speed

4. Acceleration How did you measure “instantaneous speed”? Pass an object through a light gate attached to a timer. Then “instantaneous speed = object length / time to cut beam”

5. Power Supply Timer X Light gate

6. Acceleration What letter did we use for “initial speed” ? u

7. Acceleration What letter did we use for “final speed” ? v

8. Acceleration What equation did we come up with for acceleration “a” ? a = (v – u) / t

9. Measuring Acceleration TASK SHEET In your groups design an experiment to measure the acceleration of an object on a slope. Report on your experiment as a group poster … TITLE AIM METHOD (inc diagram) MEASUREMENTS

10. Measuring Acceleration Report on your experiment as a group poster … TITLE AIM METHOD (inc diagram) MEASUREMENTS (a few runs for an average) TABLE OF RESULTS (with correct units!) CALCULATIONS CONCLUSION IMPROVEMENT SUGGESTIONS

11. Measuring Acceleration Experiment Timer t 1 Timer t 2 Stopwatch

12. Measurements Card length = t 1 = t 2 = Stopwatch, t = Calculations u = card length / t 1 = v = card length / t 2 = a = (v – u) / t =

13. Measuring Acceleration Experiment Timer t 1 Timer t 2 Timer t 3