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

Investigating Hooke's Law

Extracts from this document...


Investigating Hooke's Law Aim The aim of my coursework is to investigate and achieve a clear understanding into whether Hooke's law is true and to what extend in which it works and why. Prophecy Hooke's law states that if we add the same sized mass on to a spring its length should increase by a regular amount. For example when you double mass the extension should double. This should work until a spring reaches its elastic limit. The elastic limit of a spring is when the weight (stress) is too much and causes the spring to be permanently deformed and it does not return to its original length .The amount of deformation, as a fraction of the original size, is called strain. Elasticity is the property and the name given to a material that resumes its original size and shape after having been compressed or stretched by an external force. The elastic limit of a spring is determined by the molecular structure of the material of the actual spring. When a force is applied to the spring creating stress within the material, the molecular distances change and the material becomes deformed. Below the elastic limit, when the applied force is removed, the molecules return to their balanced position, and the elastic material goes back to its original shape. Beyond the elastic limit, the applied force separates the molecules to such an extent that they are unable to return to their original positions, and the material is permanently deformed or broken apart. ...read more.


The extension of this is 25mm. Therefore if I carried on with this I predict that if I plot a graph showing extension against the amount of masses added then it will look something like this; Method Equipment The equipment that I will need for this practical part of the investigation is; > Clamp stand > Meter ruler > Short spring > Goggles > Masses (50g) > Pen > Paper Safety Issues I will have to consider safety issues whilst carrying out my investigation for obvious reasons. I will have to wear goggles to ensure that, if I take the spring that I am investigating past its elastic limit that it will not flick up and strike my eye. Safety in the actual lab has to be considered, all stools have to be tucked in under the desk and coats and bags need to be hung up neatly at the side of the classroom away from any investigations. Also I will have to be alert to respond to any instructions that the teacher has to put forward and the practical work it self has to be taken seriously and maturely. Fair Test I will have to keep this investigation a fair test do that my results are as accurate as they can be. The way that I will keep it a fair test is that I will only have one variable and I will have to accurately measure the length of extension and not just round it to the nearest decimal place. ...read more.


Results 1st attempt 2nd attempt Weight Length Extension Length Extension 0 60 0 60 0 50 85 25 85 25 100 110 50 115 55 150 130 70 130 65 200 155 95 151 91 250 180 120 173 113 300 200 140 205 145 350 225 165 225 165 400 240 180 240 180 450 260 200 265 205 500 285 225 290 230 Working out Average Extension; 50g = 25 + 25 = 50 � 2 = 25 100g = 50 + 55 = 105 � 2 = 52.5 150g = 70 + 65 = 135 � 2 = 67.5 200g = 95 + 91 =186 � 2 = 93 250g = 120 + 113 = 233 � 2 = 116.5 300g = 140 + 145 = 285 � 2 = 142.5 350g = 165 + 165 = 330 � 2 = 165 400g = 180 + 180 = 360 � 2 = 180 450g = 200 + 205 = 405 � 2 = 202.5 500g = 225 + 230 = 455 � 2 = 227.5 I will now put what I have worked out in a table then plot a graph of the mass against the length of the spring and another graph showing the mass against the extension. Weight (g) 0 50 100 150 200 250 300 350 400 450 500 Average Extension (mm) 0 25 52.5 67.5 93 116.5 142.5 165 180 202.5 227.5 Conclusion By looking at my graphs I can see a trend. On both graphs series 1 represents the first investigation into Hooke's law and series 2 represents the second investigation that was carried out for reliability. Evaluation ...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. Peer reviewed

    What affects the voltage output of a solar panel?

    3 star(s)

    Voltage 1 (v) Voltage 2 (v) Voltage 3 (v) Average (v) 1/d� (cm-�) 10 1.43 1.44 1.42 1.43 0.010000 15 1.06 1.05 1.07 1.06 0.004444 20 0.82 0.82 0.80 0.81 0.002500 25 0.65 0.65 0.64 0.65 0.001600 30 0.53 0.52 0.53 0.53 0.001111 35 0.45 0.45 0.45 0.45 0.000816 40 0.37 0.37 0.37 0.37 0.000625 45 0.31 0.32 0.31

  2. Hooke's Law.

    x 1010 N m-2 Hooke's Law and Young's Modulus apply to most elastic materials, with the exceptions. A special shape which material can be bent into to in order to optimize use of the elasticity of a material is a spring.

  1. The aim of this investigation is to examine the effect on the spring constant ...

    I have taken is to produce a table detailing the spring constant of each system. This spring constant (which due to the experimental nature of this investigation is not an exact value but a close approximation) has been found by taking 2 points and calculate mathematically the graph's gradient using

  2. Experiment B11: Measuring focal length of lenses

    The advantages and disadvantages of method (d) are similar to those of method (a). Method (d) only need to be adjusted a few things, it is easy to be done. However, there are much more works. In method (d), a graph is needed to be plotted, need to read from

  1. Investigation on how putting springs in series and parallel affects their extension.

    By doing this I found the spring constant of the two springs in parallel to be 5.71 x10-2 (3s.f.), the spring constant of the single spring to be 2.30 x10-2 (3s.f) and the spring constant of the two springs in series to be 1.14 x10-2 (3s.f).

  2. The Stiffness Of Springs

    If I look at the numbers in the tables above I see that the spring constant for I + II is half the value for spring I. However this is not true with I + II and I + II + III and it does not show any relationship between the individual springs used and the final spring constant.

  1. Stretching Springs/Hookes Law.

    Also the external force applied to a material creates stress within the material; this stress causes the material to deform. Elasticity (physics ), property of a material that causes it to resume its original size and shape after having been compressed or stretched by an external force.

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

    a certain length, hence the extension would increase by a certain length. Tension is measured in newtons (N), which is force being exerted on something and the extension is measured in metres (m) or centimetres (cm); the most likely scenario for this experiment would be in cm and there would

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