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# Investigating the Speed of a Marble Rolling Down a Variable Ramp

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Introduction

Investigating the Speed of a Marble Rolling Down a Variable Ramp Introduction In this experiment I am going to investigate the speed of a marble rolling down a variable ramp. The input variable is the height of the ramp, so I will keep everything the same except this factor. I predict that the steeper the ramp the faster the marble will travel. I will measure the time the marble takes to travel the full length of the one metre ramp three times then from these measurements I will take an average. I will then work out the speed in metres per second (m/s), by dividing the distance by the time. ...read more.

Middle

(2) Measure the height of the ramp. The height should be 5cm at this point. (3) Roll the marble down the ramp and measure the time using a stopwatch. (4) Repeat this three times and take an average. (5) Increase the height of the ramp by 5cm and repeat stage 3 and 4 again. (6) Keep increasing the height by 5cm until eventually the end of the ramp is 40cm from the ground. (7) Divide the distances by the averages to find the speed for each result. Results Table Height Of Ramp (cm) Time Taken (s) Average Time (s) ...read more.

Conclusion

My actual graph has very much the same pattern as my predicted graph. Evaluation My investigation was fair because I measured the height of the ramp rigorously to make sure it was exactly as stated and I took three results and worked out the average to make sure that any timing mistakes would be avoided. I also changed the height of the ramp many times so that the results would show a definite pattern. I only experienced on problem whilst carrying out this experiment and that was making sure the height of the ramp was accurate. If I was going to perform the investigation again I would take more results, if possible. I feel that this would make the pattern in the results, and therefore on the graph, more defined. Martin Davies 10M Physics Coursework ...read more.

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