• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6
7. 7
7
8. 8
8

# 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.

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

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)

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

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

# Related AS and A Level Fields & Forces essays

1. ## paper cones investigation

5 star(s)

plotted and a best fit line added: The trend on this graph confirms that the theory outlined earlier is still plausible. t2 is linearly related to 1/m with a small y-axis intercept. The gradient of this line should be equal to .

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. ## Measuring Young modulus of copper

Precautions (I) Be stayed clear from the wire when it was about to break. (II) The records are taken after 10 seconds as the hanger and the masses are became stable. (III) The weight of the hanger is measured before the experiment.

2. ## 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

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

ball bearing I used an micrometre as I thought this piece of equipment was very accurate in measuring very small objects. I had to wash the ball bearing under water, and wipe with a paper towel, I did this because I thought the charge on the ball bearing could affect its velocity.

2. ## Measuring The Constant g; The Acceleration Due To Gravity

- 0.4 9 - 0.37 9.73 - 0.36 10 - 0.35 10.28 4 0.45 8.88 - 0.44 9.09 - 0.42 9.52 - 0.4 10 - 0.41 9.76 4.4 0.48 9.17 - 0.44 10 - 0.46 9.57 - 0.49 8.98 - 0.44 10 4.8 0.49 9.8 - 0.5 9.6 - 0.54

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