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# Investigate the effects of weight on the time of fall of a cake case.

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Introduction

Investigate the effects of weight on the time of fall of a cake case Introduction In this investigation, we wish to study what affects the time of fall. The possibilities are the mass and the height from which the cake cases are dropped. I have decided to change the weight (use it as my independent variable). Some preliminary results will be used to decide which height to drop the cake cases from: Height (cm) Time taken for five cake case to fall 100.0 0.55 120.0 0.48 140.0 0.57 160.0 0.64 180.0 0.72 200.0 0.85 I decided to drop the cake cases from a height of 200.0 cm because it is a height which can be reached safely from the ground to drop the cake cases from, and also it took the longest time (allowing for errors to be noticed more easily). ...read more.

Middle

Planned Method I will drop a number of cake cases from a height of 200 cm. Time how long it takes for the cake case to hit the ground (start the clock when it is dropped and stop it when it hits the ground). Repeat the experiment for each number of cake cases twice (3 experiments in total). Results No. of cake cases Time taken (s) Average time taken (s) Attempt 1 Attempt 2 Attempt 3 1 2.40 2.40 2.41 2.40 2 1.78 1.76 1.72 1.75 3 1.50 1.48 1.44 1.47 4 1.33 1.35 1.36 1.35 5 1.37* 1.26 1.24 1.25 6 1.03 1.05 1.06 1.05 7 0.90 0.89 0.89 0.89 8 0.81 0.79 0.80 0.80 9 0.73 0.70 0.69 0.71 10 0.65 0.66 0.63 0.65 *This was anomalous and was ignored when calculating the time taken. ...read more.

Conclusion

This shows that the experiment worked well and the method does not need much improving. More accurate results would not significantly alter the outcome as it seemed to be quite accurate. The one anomalous result was probably due to slow timekeeping. It was spotted and ignored in the average and the analysis. The results seem to be quite reliable and seem to support the conclusion that; as the total mass of the cake cases increases, the time taken for them to fall decreases. I believe there should be a direct link between these two variables and may be worthy of closer and more accurate investigation. To obtain more accurate results, light gates may be used to automatically start and stop any timers and also a more consistent way of dropping the cake cases may be used to improve the quality of the results. ...read more.

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