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# To investigate how changing a feature, like using length affects the speed of the spinner.

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Introduction

Aim: To investigate how changing a feature, like using length affects the speed of the spinner. Plan: In this investigation in testing how fast a spinner's speed is I am going to make the variable the wing length. I made a prototype spinner to observe what different types of material made a better spinner; matters that will affect the spinner are the weight of the spinner, friction, up-thrust and the gravitational pull. The bigger the surface area of the spinner the more friction there will be. Equipment: Paper, Paperclips, Stopwatch, Ruler. In the experiment I will change the wing length 10 times and cut 1 cm off each time. I will repeat this 5 times to be certain I have recorded the right time. ...read more.

Middle

The safety aspects of the investigation I have to consider are: * Make sure no-one is stood around you, * Make sure stool is safe to stand on, * Careful using scissors. Spinner: Diagram: These were my results: Wing length 1 2 3 4 5 Mean Observation Speed (cm/s)(2dp) 10 2.36 2.57 2.52 2.14 2.45 2.408 Starts spinning when dropped 1.04 9 2.24 2.34 2.09 2.00 2.27 2.188 1.14 8 2.02 2.38 2.22 1.92 2.15 2.138 1.17 7 1.98 1.82 1.99 1.63 1.94 1.872 1.34 6 1.84 1.77 1.70 1.60 1.91 1.764 1.42 5 1.41 1.47 1.54 1.52 1.60 1.508 Half way before starts spinning 1.66 4 1.29 1.28 1.46 1.38 1.25 1.332 1.88 3 1.15 1.06 1.00 1.03 1.10 1.068 2.34 2 0.90 0.84 0.84 0.84 0.84 0.832 3.00 1 0.73 0.74 0.66 0.71 0.72 0.712 Nearly at the ground ...read more.

Conclusion

Evaluation: In my opinion the methods used were reliable and easy to analyse and complete, the results I obtained are of a good standard because I achieved my aim and there weren't any outliers. In my investigation there were no problems that I came across. The method though was suitable and easy to use but could be improved by using better materials. I think there is enough evidence to support my conclusion and my data is very reliable since there were no outliers and no wrong information and speeds given. I think my investigation was extremely successful and if I was to do this investigation again I would punch holes into the wings and see if that would change the speed and mean will change because I think that would affect the spinner's flight due to air resistance. ...read more.

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