• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Investigation in the loading of a cantilever

Extracts from this document...

Introduction

Investigation in the loading of a cantilever Aim & Hypothesis I anticipate that the loading of the cantilever will show a proportional increase in the depression of the wooden ruler which will relate directly to the mass which is applied to it. This relationship is expressed in Hooke's Law, which states that "stress is directly proportional to strain." I believe that the experiment which I am going to carrying out involving the cantilever will support this and will show that that increase in mass on the ruler will result in a proportional increase in the depression. If this is the case then I will be able to draw a graph of my results and then use this to work out an unknown mass by knowing the depression of the beam. Safety RISK ASSESSMENT - LEVEL ONE This experiment does not carry many hazards. Bags and coats will be moved out of the way to ensure that no one will trip over them. Whilst loading the beam care will be taken to make sure that the ruler will not spring back when the masses are placed on by holding it steady letting go slowly when they are on. ...read more.

Middle

However as long as I measured form either the top or the bottom (and did not alter this throughout the experimeny) it would not make any difference to the graph (I measured from the top.) After I had put on all 8 masses (800g) I took them all off and checked the ruler went back to the same point as before (which was 14.2mm.) I then repeated the experiment again so that in all I did the experiment a total of 3 times, I would then out the averages. Results Mass grams Depression 1 mm Depression 2 mm Depression 3 mm Average Depression mm -14.2 mm 0 14.2 14.2 14.2 14.2 0 100 20.1 20.1 19.9 20.0 5.8 200 25.7 25.8 24.7 25.4 11.2 300 30.4 31.3 31.2 31.0 16.8 400 35.7 35.8 35.8 35.8 21.6 500 39.0 41.2 41.1 40.7 26.5 600 45.5 45.4 45.4 45.4 31.2 700 49.4 49.4 49.3 49.4 35.2 800 52.7 52.8 53.1 52.9 38.7 Error + 0.05 + 0.05 + 0.05 + 0.15 + 0.15 Depression of unknown mass = 20.2 + 0.05 Analysis I thought that my graph/results would show a proportional increase between the load of the ruler and the depression, this is shown to be the case. ...read more.

Conclusion

To improve my experiment I could test my results further by using more unknown masses and then calculating the mass using my graph this would mean that I would be able to weigh the mass and then check that with my graph to see how accurate my results are. I could also improve the uncertainty by using a smaller scale as I have already mentioned. Conclusion My results have shown that my hypothesis was right and that my experiment has shown that the cantilever does obey Hooke's Law. (That "stress is directly proportional to strain".) In other words the mass that I put onto the ruler (cantilever) had a direct and proportional affect on the depression of the ruler. The values which I got for my experiment were what I expected and gave a positively correlation graph which I thought it would. Part of my aim was that I would be able to work out an unknown mass by using the graph which I have drawn form my results. I have done this sand found that unknown mass gave a depression of 20.2 mm and therefore the mass was 370g. Catherine Needham 12SL Physics Practical - 07/11/02 Catherine Needham 12SL Physics Practical - 07/11/02 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Classifying Materials section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Classifying Materials essays

  1. Free essay

    Periodic table

    Sex chromosome - contains all the info. For the sexual characteristics of the body. Males have a longer X sex chromosome and a shorter Y sex chromosome whereas females have two X sex chromosomes. Autosomes - any chromosome that is not a sex chromosome. Karyotyping - is the process of sorting out chromosomes into the matched pairs.

  2. The role of mass customization and postponement in global logistics

    Sustainability of Mass Customisation as a Competitive Strategy Mass Customisation has become one of the important modes of facing competition thorough adding value to the product offerings. Mass Customisation enables not only value addition thorough variety but also make the consumers realise how important they are in determining the product they require.

  1. Identification of an unknown compound.

    Analysis A negative result was observed in test 1 for a phenol as no decolourisation of bromine water occurred and no white precipitate formed. This indicated the absence of a phenol and after this, test 2 was carried out. Test 2 using orange 2,4-dinitrophenylhydrazine solution was positive as an orange/red 2,4-dinitrophenylhydrazone precipitate was observed.

  2. Bonding Practical

    These are just some of the many properties that are affected by the bonding present inside a compound. I am going to do a series of tests that will help me determine what type of bonding is present inside the compounds.

  1. What "Carried the Trick"? Mass exploitation and the decline of thought in Ray Bradbury's ...

    Authors, full of evil thoughts, lock up your typewriters. They did Magazines became a nice blend of vanilla tapioca. Books . . . were dishwater. (57) Beatty thus not only directly claims minority pressure as a cause of intellectual self-censorship and conformity but also emphasizes its pervasiveness with his rhetoric,

  2. Science Coursework - Osmosis investigation

    We then made a table and recorded in our start mass. We left our experiments in the classroom and came back to them the next day. We took out our pieces of potatoes from the solutions and the water, and weighed them.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work