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

Investigate Hooke's law, using masses and springs.

Extracts from this document...

Introduction

Aim My aim is to investigate Hooke's law, using masses and springs. Background knowledge When weights are attached to one end of a spring it stretches. Hooke's law states that the extension depends directly on the load, that is: Extension (E) is proportional to the load (M) added. So if this is true doubling the load should double the extension. I know the limit of proportionality is when the spring becomes less stiff and the same force causes a greater stretch than below the limit of proportionality. If you carry on exerting a force on the spring then it looses its elasticity and will not return to its original shape. Prediction As the extension is proportional to the force (load) I think the spring will obey Hooke's law until the limit of proportionality. Plan I think the best way to display my results are in a graph because then you can see exactly how the spring obeys Hooke's law, you then also see where it reaches it's limit of proportionality. ...read more.

Middle

Here are some ways to make it safer: * You could wear goggles when placing more weights onto the mass holder. * Place the weights on at arms length. * Place the weights on the mass holder gently do not drop them on it. * Make sure the large weight holding the clamp on the table is secure and will not fall off. * When placing weights on the mass holder don't let anyone stand in a 2m radius of the experiment. * When the spring looks like it will break abort the experiment. Fair test Ways of making it a fair test are: * Trying to get springs that are the same strength. * Always using the same weight intervals. (100g) * Always try and read the ruler from the same point. * I will do the experiment 4 times because you then have a smaller chance of having errors and if you have a bad reading you can compare it with the rest. * To make it a fair test whenever I start the experiment I will always finish it, and if for some reason I can't, when I come back to it I will start it again. ...read more.

Conclusion

- Biggest = 3.72 - 3.95 = -0.23 - = Average ext. - Smallest = 3.72 - 3.375 = 0.35 From this I can see my largest error to be only 0.35cm. I can extend this to say my experimental error is +/- 0.35cm per 100g extension. Because this figure is small it shows I have executed the experiment reliably. Evaluation The results that are in red I have ignored because they do not follow my pattern and are anomalous results. A reason for them being like this could be due to the error of parallax. This is shown below: If I were to repeat the experiment I would try to minimise the magnitude of errors by using a more accurate method of measuring the extension. At the moment I am just using a ball of plastercine and a paper clip, there are many ways of decreasing the margin of error for example using lasers but this is prohibitively expensive and add an added danger. For the amount of reduction in error this would be pointless as there is always going to be a slight error. Conclusion I have found that the extension is proportional to the load and therefore I have satisfied my original prediction. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Waves & Cosmology 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 AS and A Level Waves & Cosmology essays

  1. Hooke's Law.

    Another measure I am taking is that I shall not be the only one to take readings from the metre rule; I shall have two other peers who will also be reading off the same metre rule. From these 3 readings I shall draw up averages of level of weight applied to the spring.

  2. Investigate stretching using Hooke's Law.

    5.0N 246mm 70mm 176mm 5.5N 264mm 88mm 176mm 6.0N 283mm 107mm 176mm 6.5N 299mm 123mm 176mm 7.0N 317mm 141mm 176mm 7.5N 335mm 159mm 176mm 8.0N 347mm 171mm 176mm 8.5N 363mm 187mm 176mm 9.0N 375mm 199mm 176mm 9.5N 386mm 210mm 176mm 10N 395mm 219mm AVERAGED RESULTS FOR ELASTIC MATERIAL Original Length

  1. Stretching Springs/Hookes Law.

    Hooke also pioneered in microscopic research and published his observations, which included the discovery of plant cells. Encarta The aim of this investigation is to find out if extension is proportional to the force applied, and to find out the elastic limit of our spring which we will measure each

  2. An Experiment To Examine the Effect of Springs In Parallel

    If I were to use a steel spring and a copper spring there would be a very big difference in extension when a particular weight (N) is applied. Copper would extend more than steel when the same weight is applied to each.

  1. The Stiffness Of Springs

    This will happen because the spring system as a whole will have spring stiffness of the total of the two individual springs used. Therefore a parallel system would have a combined spring stiffness of the individual springs in it. e.g.

  2. Investigation into the elasticity of a set of springs under differing conditions.

    I believe that this will happen because when the springs are in parallel the resistance to the load will be doubled, thereby halving the extension. I also believe that when the springs are arranged in series then the extension will double, this is because the springs resistance to the load will be halved i.e.

  1. An experiment to investigate and determine how rubber behaves when tension forces are applied ...

    A stand so that I can fit my g-clamp to this. 3. A g-clamp to hold a suitable sized nail for the rubber band to fit around. 4. A large nail for the rubber band to rest upon. 5.

  2. Investigation based on Hooke's law.

    Add a Newton weight on to the mass hanger. 6) Record the extension of the springs against the ruler. 7) Repeat this procedure until 6 Newtons have been placed on the mass hanger. 8) Remove a Newton weight. 9) Record the extension of the springs against the ruler. 10)

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