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  • Level: GCSE
  • Subject: Science
  • Essay length: 2437 words

Experiment To Determine How the Change In the Force of the Weight Affects the Depresion of the Ruler.

Extracts from this essay...

Introduction

EXPERIMENT TO DETERMINE HOW THE CHANGE IN THE FORCE OF THE WEIGHT AFFECTS THE DEPRESION OF THE RULER. In this experiment I am going to investigate how the change of in the force of the weight affects the depression of the ruler. This experiment will mainly be based on Hooke's law and the moment's law. METHOD * First we are going to collect our apparatus and set it up on the table. I will clamp a 1m ruler onto the table parallel with 50cm of the ruler hanging over the edge. * We will then place a piece of wood over the ruler to make the ruler is secure. We will lock the wood to the ruler using the G-clamp... * We will then attach another ruler at the end of the ruler on the edge of the table. This will help us measure the length between the ruler which has bent downwards and the straight ruler attached to the clamp. To determine the depression of the ruler. * We will attach a piece string to the parallel ruler at the 950mm mark. We will hang the weights on that piece of string. * We will keep changing the force of weights each time keeping the string at the same position. We will repeat the experiment 3 times and achieve an average.

Middle

WIEGHT ON RULER BEND OF RULER FROM NORMAL (CM) 1ST 2ND 3RD AVG 100g 15 15.1 15.1 15.07 200g 15.5 15.5 15.4 15.47 300g 16 15.8 15.6 15.87 400g 16.3 16.2 16.2 16.23 500g 16.6 16.6 16.5 16.57 600g 17 17 17.1 17.03 700g 17.5 17.4 17.4 17.43 800g 17.7 17.7 17.8 17.73 900g 18.1 17.9 18.1 18 1000g 18.4 18.5 18.5 18.5 All the results I gained were correct to 2 decimal places. All of my results were recorded using a 1m ruler, I used the cm on the ruler. To ensure that my results were as accurate as possible I repeated the experiment three times and then gained an average. ANALYSIS From my results I have found that as we increase the force of the weight, the depression of the weight and the angle of the weight increases. I have noticed that as the force of the weight increases by 100g the depression of the ruler increases by 0.40 to 0.30cm each time. CONCLUSION From this investigation I have found that as I increased the force of the weight the depression of the ruler from the normal increased. This resulted in proving Hooke's law that the extension of the object does depend on the material. As I consistently increased the force of the weight, the angle of depression gradually also increased, resulting in the ruler increasing in length.

Conclusion

I think the results I gained from this experiment were sufficient enough for me to come to a formal conclusion. I predicted before the experiment that as the force of the weight increased, the depression of the ruler from the normal would have also increased. This would prove that the extension of the ruler would really depend upon the force of the weight. I also made the prediction that the length of the ruler would increase and it would be slightly out of shape due to Hooke's law. The prediction I made agreed with the Hooke's law and my results from this experiment. There were a number of anomalous results in my investigation. This might have occurred because:- * Parallax error. * Unavoidable certainties. * Human error with the measurements. * Hooke's law. * Beam quicker before we started. I could have carried out some further work on this investigation to extend and broaden my results. I could have investigated different things such as rulers with different thickness, different material, I could have also changed the length of the overhead. I could have investigated how much weight would I have to put on to the ruler until it reached its elastic limit. I could have done another experiment using varying the same amount of weights and using the same objects but this time changing the position of the weight and linking them together. I could investigate if the results agree with my prediction and Hooke's law.

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