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

Does a rubber band obey Hooke's law?

Extracts from this document...

Introduction

Inderveer Singh Hothi

          Teacher:      Mr. Sidhu

               Form:      10H

Science group:      10D4

Physics Coursework

Does a rubber band obey Hooke’s Law?


Aim

Aim: Does a rubber band obey Hooke’s law?

Planning

Scientific Knowledge:

The seventeenth century scientist Robert Hooke

was the first person to realize that the extension of a

spring keeps in step with the force on it. So this

result is now called Hooke's law. A simple way of

describing this is by means of a graph. When the

extension is directly proportional to the force, the

graph is a straight line through the origin:

image00.png

The point at which a material ceases to obey Hooke's Law is known as its elastic limit. The first part is very easy. It means that the bigger the weight (stress) you hang on the string the more it will stretch (strain). The second part is also easy. Whilst the elastic limit is not exceeded, the string will go back to its original length when you take the weights off it, but if you add too

...read more.

Middle

Next set-up your apparatus as shown below.

Now start with your rubber band.

First record the measurement at the hanger.

Now add 1N

Then record the result by getting your small ruler and going across from the bottom of the spring to the 1m rule and record the result. Remember to try and keep your small ruler as horizontal as possible.

Now do steps 5-6 again each time adding on 1 extra Newton until your total gets to 10N.

...read more.

Conclusion

I could have compared a spring with a rubber band and talk about there differences and similarities.

After looking at my computerised and hand drawn graph I found that there were not any results that did not fall on my best fit curve, the reasons for this may have been that I was very accurate in my readings and that they were very precise.

If I did this experiment again I would make the following changes:

  • I would take the results down three times to improve the accuracy and precision of my results.
  • I would do the experiment with more weights so that we could see at what weight would reach the rubber bands elastic limit.

I could have improved my results and readings if I had done the following more carefully:

  • By double-checking the readings.
  • Taking care not to move the apparatus while conducting the experiment.

I can also do this investigation in a number of different ways:

  • Conduct the experiment with different types of rubber bands so that I could compare the differences and similarities between them.
  • I could conduct the experiment with a spring as well as a rubber band so that I could compare them.

INDERVEER SINGH HOTHI

...read more.

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)

    This causes it to behave in an elastic manner when large tension is applied. The theories of atomic structure and molecular bonding explain why this happens. Rubber is a natural polymer which is made up of long chains of molecules.

  2. Hooke's Law.

    e = change in length/extension of object, in cm p = original length of object, in cm a = cross-sectional area of object, in cm2 f = size of force applied, in newtons For example, the Young's Modulus of Mild Steel = 2 x 1011 N m-2 Copper = 11

  1. Stretching Rubber Bands

    did not go over the limit. Here are my graphs; there is a hand written copy of each for accuracy, to compare with my predicted graph. However, one part of my prediction was correct. As you can see from the results, each time I repeated the experiment, the rubber band's extension grew slightly.

  2. Testing Hooke's Law

    1400 1.4 448 48 500 100 517 117 488.33 88.33 1500 1.5 460 60 500 100 543 143 501.00 101.00 1600 1.6 470 70 470.00 70.00 1700 1.7 480 80 480.00 80.00 1800 1.8 520 120 520.00 120.00 1900 1.9 540 140 540.00 140.00 2000 2 580 180 580.00 180.00

  1. Investigate the way in which extension depends on the tension for rubber.

    no pattern to it and was not 'x' was not proportional to 'y'. This curved graph represented an elastic band, and the gave the statement 'An elastic band does not obey Hooke's law'. Apparatus: � stand � elastic band � Weights � Ruler � Tray or box � Nail Method:

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

    Prediction In the experiment it is quite hard for me to say how the results will turn out and I am not sure if the tension will be proportional to the extension as my background knowledge on the situation is minimal.

  1. Stretching Springs/Hookes Law.

    When a string is stretched and then released it returns to its original shape and length, however this is only in use if the spring isn't overstretched. An overstretched is noticeable and can't be returned to its original position because the coil pulls out and it changes the shape of

  2. Investigation based on Hooke's law.

    Check that the pointer, pencil, is at 90o from the spring to the ruler. 3) Hang the mass hanger on to the spring. 4) Record the extension of the spring against the ruler. 5) Add a Newton weight on to the mass hanger.

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