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

Investigation to show how Elastic Bands Behave Under Load.

Extracts from this document...


Investigation to show how Elastic Bands Behave Under Load Prediction The aim of the investigation is to determine how elastic bands behave under load. Before I begin the investigation I will carry out a preliminary experiment into the behaviour of a spring, which I believe will not act in the same way as the elastic band. In the preliminary investigation a spring was put under load and the results were as follows: Load/g Length/cm Extension/cm 0 2.2 0 100 11.0 8.8 200 13.1 10.9 300 15.3 13.1 400 17.2 15.0 500 21.1 18.9 600 24.6 22.4 700 29.0 26.8 800 34.3 32.1 900 88.5 36.3 1000 42.0 39.8 1100 46.6 44.4 1200 1300 1400 From previous knowledge of Hooke's Law, which explains, extension is proportional to load until elastic limit is reached. The preliminary experiment with the spring shows, that they obey Hooke's Law up until the point of permanent deformation (elastic limit). I think that the thinner rubber band will have a bigger extension than the thicker band and the longer band will have bigger extension than the shorter band. I think the longer rubber band will have the biggest extension because the molecules within the rubber band are larger and are less intertwined and the molecules are therefore stretched further causing it to have a greater extension. Although the band is stretched the rubber band does not obey Hooke's Law. The elastic band will regain its initial shape and it behaves elastically. ...read more.


Load/g Length/cm Extension/cm 0 15.2 0 100 25.3 10.1 200 42.4 27.2 300 60.6 45.4 400 72.1 56.9 500 77.6 62.4 600 83.7 68.5 700 86.4 71.2 800 89.1 73.9 900 89.9 74.7 1000 94.4 79.2 Changing the width, keeping length the same. 1.) Thicker Band Length = 6.7 cm Width = 1 mm Load/g Length/cm Extension/cm 0 6.7 0 100 10.5 3.8 200 12.9 6.2 300 15.7 9.0 400 19.6 12.9 500 23.8 17.1 600 29.1 22.4 700 32.2 25.5 800 35.9 29.2 900 38.5 31.8 1000 43.0 36.3 We repeated our results on this band. Load/g Length/cm Extension/cm 0 7.8 0 100 11.1 3.3 200 12.7 4.9 300 14.8 7.0 400 20.3 12.5 500 23.9 16.1 600 29.5 21.7 700 34.1 26.3 800 37.5 29.7 900 40.3 32.5 1000 42.4 34.6 2.) Thinner Band Length = 6.5cm Width = 0.5 mm Load/g Length/cm Extension/cm 0 6.5 0 100 14.8 8.3 200 26.3 19.8 300 35.3 28.8 400 41.7 35.2 500 45.9 39.4 600 49.0 42.5 700 51.1 44.6 800 53.6 47.1 900 54.3 47.8 1000 55.6 49.1 We repeated our results on this band. Load/g Length/cm Extension/cm 0 8.8 0 100 14.4 5.6 200 25.3 16.5 300 37.1 28.3 400 44.6 35.8 500 50.2 41.4 600 52.8 44.0 700 54.4 45.6 800 55.6 46.8 900 57.3 48.5 1000 59.4 50.6 Analysis From my results I have found that the longer band stretches further than the shorter band and the thinner band stretches further than the thicker band. ...read more.


These problems could be overcome by clamping the ruler by the elastic band, so that all the results would be the same. This would stop any anomalous results, when reading the length and make sure that that they are read at eyelevel and checked before you record them. Also using more detailed equipment so that the results could be more reliable. The conclusions I have made are true for all elastic bands I measured. I would have to experiment further with different elastic bands to prove that my conclusions were true. I couldn't say for sure what would happen to other elastic bands of different lengths and widths, as it would have to be investigated further. I also could measure an elastic band to a certain length or width to see if my conclusions are true. If I were to do the experiment again I would look at other materials to stretch such as copper, steel, rubber etc to see if any other materials obey Hooke's Law. I could again look at different lengths and widths of other elastic bands. I would also use accurate measuring equipment so that no errors occur and good, clear accurate results are obtained. The good results would present a clear idea of how elastic bands behave under load. Further experiments could be carried out, using different equipment to see if my conclusions are true that elastic bands do not obey Hooke's Law. ...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.

    This should be carried on until the weights can no longer be attached to the hanging spring. APPARATUS The apparatus that I shall need set up for my experiment consist of the following items: 1. Retort Stands (x 2) 2.

  2. Does a rubber band obey Hooke's law?

    * I made sure I added an equal number of weights each time. * I made sure I double-checked my readings. * I made sure that there were no movement of the apparatus while I was conducting the experiment. * I made sure that I waited for the rubber band to stop moving after adding each weight.

  1. To investigate the stretching of an elastic band when it has some load on ...

    The elastic limit nearly coincides with the proportional limit for some elastic materials. Prediction: I predict that the results graph for extension versus load is a straight line with a curve to it at the top when it has reached the elastic limit.

  2. Experiment B11: Measuring focal length of lenses

    screen, but so much time needs to be spent to find the suitable positions for both apparatus. In this method, no graph and less calculation are needed to measure the mean focal length of the concave lens. Therefore, fewer errors occur and the measured value is more accurate.

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

    The rubber band increases in length a certain way until it will suddenly give way. This is because the tension exerted on the rubber band cannot be too great and that the extension of the sample will only go a certain way before it can be extended any longer than it's original length.

  2. Stretching Springs/Hookes Law.

    We will also try to keep the table clean to make it safe and we will also remove all bags or put them under the table or hang them up just in case so no one falls over. We will also remove all stools so that no one will fall over and we will put them under the tables.

  1. I am doing an investigation in to how much a metre rule bends when ...

    My results and my graph prove that Hooke's Law is correct, as I have clearly seen that 'the extension is directly proportional to the stretching force.' This means that my conclusion supports my hypothesis entirely as I predicted all of these things that eventually happened and can now be seen in my results and my graph.

  2. Resonance in a Closed Air Column Investigation.

    and come back out of the tube which resembles a reflected wave. The reflected wave translates into a standing wave which is the reason for the different resonant lengths. Resonance is evident in this scenario because the natural frequency of tuning fork (or the waves sent out by the tuning fork)

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