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

Stretching Rubber Bands

Extracts from this document...

Introduction

Stretching Rubber Bands Planning Aim We have studied the effect of a stretching force on a steel spring. We are now asked to investigate what extent rubber bands behave like steel springs. Design and carry out an experiment to test rubber bands for their elasticity. At least, two types of rubber band are available; although you may ask for more if we require them. Variables Dependent - stretching force Independent - extension Fixed - width of band, type of band I will be testing the extension of the band, by placing differing loads on it. The width and type of band will be kept the same by using the same rubber band throughout the experiment. This is to ensure a fair test. Prediction I predict that the rubber band will act very similar to the steel spring. I think that the predicted graph will look like this: - This graph is like this because the extension increases in proportion to the load, until point B. This is when the band has reached its elastic limit and snaps. Therefore the load it can take will be 0g. ...read more.

Middle

Loading (cm) Unloading (cm) 1 0.0 2.0 2 5.9 12.9 3 12.5 21.9 4 18.3 23.9 5 20.9 25.0 6 23.0 25.4 7 24.6 25.9 8 25.3 26.3 9 26.3 26.8 10 26.9 26.9 Extension Weight (N) Loading (cm) Unloading (cm) 1 0.0 2.9 2 5.2 12.6 3 11.5 22.0 4 16.7 23.2 5 21.6 24.1 6 23.6 25.1 7 24.5 26.0 8 25.4 26.6 9 26.2 26.9 10 27.1 27.1 Average Extension Weight (N) Loading (cm) Unloading (cm) 1 0.0 2.0 2 5.3 11.8 3 11.4 21.2 4 15.7 22.8 5 20.8 23.7 6 22.3 24.3 7 23.5 25.0 8 24.6 25.6 9 25.5 26.1 10 26.3 26.3 There are no anomalous results, all given results where used in calculating the average extension. Analysis My prediction was correct in the fact that the extension did increase as the load did, however, I was incorrect in saying that they would increase in proportion. This is not so, as we can see from the graph (it is a curve). This also means that my predicted graph is wrong, as I predicted a straight-line graph. I was unable to prove my point that the band would reach its elastic limit and snap, because the maximum load I was using (10N) ...read more.

Conclusion

In order to gain accurate results from this mirror method, you must make sure that the mirror is parallel with the ruler, otherwise the angle may be wrong. This is something I think I could improve on if I was to repeat the experiment. There were no anomalous results that I could pick out, so the procedure I carried out was quite good. Another thing I would change about that procedure, however, is the pin used as a pointer onto the ruler. I stuck it to the top of the weight holder with plaster scene. I felt this was not the best way of doing so and would use cello tape instead. This is because I would have been able to ensure that the pin was at a right angle to the ruler and the cello tape would have stopped the pin from moving which was impossible while using plaster scene. Testing another type of elastic band or investigating the same thing with a steel spring could have furthered the experiment, so that you could directly compare the results. Also, preliminary work to test elastic limits the bands' (or springs') would have given us better graphs, as I could have got a better curve. ...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

    Investigation on whether Rubber obeys Hooke's Rule

    3 star(s)

    When the temperature increases, the particles are able to move more freely in the rubber as they have more energy so the rubber band stretches easily. Thus, less force is needed to produce a relatively larger extension. Variables and Constants To create a fair test, certain aspects of the experiment

  2. Find out what factors effect the stretching of a spring.

    By comparison K = 1 <THORN> 1 = 28.7769 m 0.03475 This shows the spring constant is 28.7769 N/m To check that my spring constant from hooks law was correct I am going t experiment again using Simple Harmonic Motion.

  1. An investigation into the stretching of materials

    I will test three elastic bands. There is not a time limit on the experiment and so setting a time measurement is not a problem. I will measure the extension in centimetres/millimetres. Prediction I expect that my experiment will show that; � The extension of the band will not be proportional to the force applied, as

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

    be force being pulled on the rubber band, which would measured in kilograms (kg) or grams (g), which again grams would be the most likely option for the set scenario. This allows me then to construct a formula to measure the proportionality of the extension and tension.

  1. Investigate stretching using Hooke's Law.

    at equal amounts until they have been stretched beyond their elastic limit. SAFETY I will have to be careful to make sure that if the material breaks or snaps the falling weight could not be a danger to anyone. I will be taking minor precautions and shall not be adding ridiculous amounts of weight onto the materials.

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

    Once the experiment has been completed and the results have been tabulated then I will take into consideration the errors. This will include any errors in: 1. Time keeping i.e stop clock, human reflexes. 2. Measurements i.e the ruler. Analysis The results that I have collected have proved very conclusive.

  1. Investigation of the structure of a cantilever beam.

    Also the breadth of the ruler can be measured using a vernia calapus. This will also be done 3 times at different parts of the ruler to give an average breadth. All these readings are taken a number of times to give an average for all the values for the final calculation of the young's modulus.

  2. Investigating elastic bands in comparison with springs.

    This is because as the spring is stretched, up to it's elastic limit, it uncoils and is strong enough, as Hooke's law states, to return to its original form. The band however, I think will be weaker as once the particles have been unravelled from the weight of the load, they will find it hard to restore their original shape.

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