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

Elastictvy of Copper investigation

Extracts from this document...

Introduction

Elasticity of Copper investigation

In this experiment I will investigate how the extension e of a length of copper wire changes as the stretching force F is increase. The question I will be answering is: “If a wire whose original length was L is subjected to a stretching force F then will the wire increase in length by the amount e

The aim of this experiment is to investigate how the extension of a length of wire is affected by the force. I will then find stress and strain after finding these variables, for which I can finally complete my objective which is to find the young's modulus for the material, in this case copper wire. My aim is to measure the extension in a piece of copper while consider safety precautions and accuracy. For the experiment I will have to also consider the accuracy of both my equipment and the degree of accuracy for my results. Furthermore I will have to find a suitable range of results so that I can form a reliable basis for my conclusion, also so to allow me to show a clear set of results on a graph so that I can identity the trend.

Hypothesis I predict that when a wire is subjected to a stretching force, in this case wire being pulled by the force of weight, then the wire likely to be stretched.

...read more.

Middle

5. The loads was increased steadily while the results were recorded in each stage

The Potentional problems which may come are:

  • The wire may slip from the clamp hold and result in varied results
  • The exposure to the weights may not be consistent and result in wrong results  

To measure the wire I used Vernier callipers

image03.png

Actual Results:

For Thin Wire. Initial area of 0.37

Mass(Kg)

Force(N)

Area(Average)(m)

Extension(m)

Stress(N/m2)

Strain(e/L)

0.5kg

4.90

0.0011

0.002

4.455x1010

1.2 x1012

1.0kg

9.80

0.0011

0.003

8.909x1010

1.8 x1012

1.5kg

14.70

0.0011

0.005

1.336x1010

2.7 x1012

2.0kg

19.60

0.0011

0.006

1.782x1011

3.6 x1012

2.2kg

21.60

0.0011

0.021

1.964x1011

1.27 x1013

2.4kg

23.52

0.0011

0.048

2.138x1011

2.91 x1013

2.6kg

25.48

0.0011

0.082

2.316x1011

4.97 x1013

2.8kg

27.44

0.0010

0.139

2.74x1011

8.42 x1013

3.0kg

29.40

0.0010

0.167

2.94x1011

1.01 x1014

Thick Wire : Initial area of 0.57

Mass(Kg)

Force(N)

Area(Average)(m)

Extension(m)

...read more.

Conclusion

Another problem was that I was unable to use Searle’s apparatus to conduct the experiment because it was too complicated and there was insufficient place to make the wire longer than 1 m long.

The final problem that occurred was the length of wire. While doing the experiment we found it better to not measure from the end of pulley. We instead measured just before the pulley by 35cm however did not compensate for this and so therefore the overall length that we measuring decreased from 2m to 1.65m.

However, there are a few ways in which my experiment could have been improved to make the validity of the investigation a lot better. Here are a few improvements I would suggest that I make:

>Repeat readings- If I was to repeat the readings I would be able to gather a better range of results and get more reliable results. Also by repeating them I can ensure that I pick the right method to conduct the experiment with more accuracy

Also I think that I could change the length of the wire I used in repeating the experiment. with this it would allow me to get a better range of results.

Also I need to find a better way or reading indentifying the break point of the wire

Another improvement might be to use a greater range of materials which may give a better insight into the stress and strain/Young modulus theory

Finally I think that I could use a different method to record the way I get the results/readings more accurately

...read more.

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

  1. Peer reviewed

    Investigating the forces acting on a trolley on a ramp

    5 star(s)

    So for when O = 10.8�; g = 1.6373 / (0.18738 - (0.02793 x 0.98229)) = 10.237ms-2 (5s.f.) A similar calculation can be done for the other values of O; When O = 6.6�; g = 0.7338 / (0.11494 - (0.02793 x 0.99337))

  2. The experiment involves the determination, of the effective mass of a spring (ms) and ...

    16.7 diff2 = 4.6 Then the average value of these results must be found, av = 4.6 + 8.2 2 av = 6.4 This is the uncertainty in k so it can be said that, k = 20 +/? 6 N/m Similarly the uncertainty of ms can be found by

  1. Experiment to determine gravity from a spring using analogue techniques

    Period (s) Period Squared 0.01 4.60 0.460 0.212 0.02 5.55 0.555 0.308 0.03 6.45 0.645 0.416 0.04 7.00 0.700 0.490 So the graph of period squared against mass is: From this, the equation shown for spring one can be used to calculate the spring constant for this spring: Uncertainties Calculating

  2. How can I work out the Young's Modulus of copper wire?

    This does not give an accurate representation of the yield point of the material by any means, as it doesn't show the material itself snapping, just the loop unraveling. This will therefore not show the point at which the material starts to undergo plastic deformation, and will hence make the

  1. Young Modulus of Copper

    Fix an adhesive label on to the copper wire to act as a marker . 2. Measure the original length L of the wire between the wooden block and the marker . 3. Load the wire in steps with load m and record the extension e produced .

  2. Viscosity Experiment. The aim of my investigation will be to analyse the relationship ...

    So when the bottom of the ball bearing when past the 80 mark at terminal velocity I activated the stopwatch, and when the bottom of the ball bearing went past the 20 mark I deactivated the stopwatch. I personally think that my method did not have any significant risks or hazards.

  1. Measuring The Constant g; The Acceleration Due To Gravity

    1.6 1.8 2 2.2 2.4 The regression equation generated for the trend line is y = 9.6x, making the gradient roughly equal to the g value. The product moment correlation coefficient for this data is 0.99589, confirming to us the extremely high strength of the correlation, and therefore the consistency of my results.

  2. Einstein's theory of relativity.

    The following deductions have been made from these postulates by mathematical means. According to the special relativity theory, a material body can only move with a velocity lower than that of light. If a conductor on a fast-moving train compared his clock with the many clocks in the stations he

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