... to do the experiment but we made sure that we did the experiment in the same place throughout. We recorded our results on a book and put it on to a table. Fair test The variables we didn't change in order to make this as fair test were the equipment and the place we did the experiment. We did this by writing our name in the equipment we used. Diagram Safety When we were doing the experiment we made sure no one stood in front of the wood which was going to be released. We wore goggles so our eyes won't get damages if the rubber band flies at us. Other Precautions During the investigation we must make sure that we don't make any human error such as recording the distance wrongly or plotting the results wrong. These are the results(in cm) 5N 5N+1Weight 5N+2Weights 5N+3Weights 16 12 5 1 15 10 6 2 16 13 7 3 15 9 5 3 17 7 5 4 10N 10N+1Weight 10N+2Weights 10N+3Weights 79 65 55 38 77 62 49 41 76 59 58 42 76 71 53 36 78 63 47 45 15N 15N+1Weight 15N+2Weights 15N+3Weights 130 110 91 60 155 116 98 64 121 119 100 71 120 115 95 59 118 114 94 57 20N 20N+1Weight 20N+2Weights 20N+3Weights 205 169 132 115 267 210 134 104 250 121 135 105 230 208 130 110 200 191 121 102 Observations Standard Deviation I did standard deviation to find out how spread the collected data is. Here ...

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