• 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

Elastic Band Investigation.

Extracts from this document...

Introduction

Elastic Band Investigation The things that might affect this are: - Downward force applied to the elastic band - Length of elastic band - Thickness of band - Band material My prediction for this experiment is that I think that the more force you exert on the elastic band then the longer its length will be. This is because extension is proportional to load and so if the load increases so does the extension and so does the stretching distance. Shown on a graph, I think it will look like this: This shows that as the force (f) gets bigger, then the extension (x) will also get bigger. Higher values represent stronger, less stretchy bands, and lower values represent weaker, easier to stretch bands. I have done some research and found that this experiment is based on 'Hooke's Law' Hooke's law is when you stretch or compress an object and they change shape, for some elastic materials a steady change in force produces a steady change in shape. Another way of saying this is that if you apply a force to a spring, the spring will stretch by some length. Double the force, double the stretch, and so on. ...read more.

Middle

We will carry out the experiment 3 times, the first and second being us measuring the length as the weights are put on, and the third us measuring the length as the weights are being taken off to see if there is a difference in the length when it is taken off and when it is being put on. We will also take an average. However, I will not use the third experiment in my average. As far as safety precautions go, we will wear safety goggles, just in case the elastic band does snap, which will be highly unlikely, due to the first experiment we did to find out the elastic limit. But, we will also use something to hold the clamp in place, so it doesn't fall over. Experiment diagram The weights we had were 10N each, so I have started off with 10N and finished with 200N. Results table Force in N Test 1 Test 2 Test 3 Average 0 10 9 9.8 9.5 10 11.5 9.6 11.5 10.55 20 14.4 11 13.6 12.7 30 20.3 12 16.1 16.15 40 25 13.8 20 19.4 50 29.7 16 22 22.85 60 31.8 18.2 25.7 25 70 34.5 20.3 29.3 27.4 80 36 22 34.9 29 90 37.5 23.8 36.5 30.65 100 38.5 ...read more.

Conclusion

However, it appeared that as the extension increased the difference between the two results decreased slightly. The reason could be that the elastic band was nearing its limit of proportionality. This shows that my results for this experiment support Hooke's Law, which proves the prediction to be correct. The first experiment to find the elastic limit for the elastic band helped with the safety precautions. There was very little danger that the elastic band would snap if the elastic limit was not reached. In conclusion the results supported each other as well as the laws they were based on. If the experiment were to be repeated, then I would make some changes in the way it was carried it out to reduce experimental error. * In both tests it would have been preferable to hold the ruler in place by using a boss clamp instead of holding it. This would ensure more accurate results by removing human error. * I would have used a pointer on the elastic band that would also help me gather the information more accurately, this would help by pointing to the measurement instead of us having to bend down and look. By undertaking the experiment again I could ensure that the results were accurate which would mean that the averages were more reliable. ...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

Related AS and A Level Waves & Cosmology essays

1. Hooke's Law.

Retort Stands (x 2) 2. Boss and Clamps (x 2) 3. Metre Rule 4. Spring (length: 50 mm) 5. Newton Weights (x 15 approximately) Other items I shall need are three pairs of goggles. SAFETY I must consider my safety when working in the laboratory.

2. Stretching Springs/Hookes Law.

The forces of attraction/bonds between the particles stretches because when it stretches it makes the particles separate, so it then after the weights have been removed go back to normal because they are attracted to each other only if the weights that are put on do not make the spring

1. An investigation into the stretching of materials

This is not a particularly dangerous experiment and therefore there are no other precautions I need to take in order to be safe. Safety goggles could also be worn if I am worried about fragments of elastic band hitting me in the eye, but seeing as the bands are not particularly brittle this is not a problem.

2. Investigating elastic bands in comparison with springs.

* 2 clamps stands-one to hold the band and one to hold the ruler. * 2 clamps-to secure the stands safely to the table. * 7 Newton's in weight-too many more and the band is likely to snap making it unusable and I will have to start again with another band.

1. An Investigation into the Factors, which affect the Voltage Output of a Solar Cell

1 2 3 4 5 6 7 8 9 10 Voltage Output 2.73 2.60 2.31 2.04 1.55 1.34 0.94 0.83 0.28 0.15 As my Preliminary Experiment table shows I was able to record ten different voltage readings. My method for collecting my results as shown above are as follows: *

2. Investigate the effects of how springs and elastic bands stretch when weights are hung ...

clamp so I could measure the distance that the spring had gone down and stretched. Obviously the more weight we put on the further the spring went down. I placed the spring on the clamp and measured the starting point of the spring on the ruler and marked it with a removable pen.

1. Investigation to show how Elastic Bands Behave Under Load.

(From World of Physics by John Avison.) On no point of the graph does the rubber obey Hooke's Law. I think this could be true for the elastic bands I will investigate. Safety * I will wear goggles to make sure no injury will occur to the eyes.

2. In this experiment, I am going to find out the relationship between Force and ...

provided the elastic limit is not exceeded. This is because of the structure and arrangement of molecules in the stretchy sweet. When a load is applied to the sweet the molecules in the sweet straighten out as atoms in the lattice slide over each other, allowing the sweet to become longer.

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