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

My aim in this experiment is to find out how force affects the extension of a spring.

Extracts from this document...

Introduction

        -  -        

                How does force affect the extension of a spring?

Aim

My aim in this experiment is to find out how force affects the extension of a spring.

Background Information

Springs are used as force-measuring instruments in everyday life, for example in spring balances and Newton meters. They are also used in watches, toys, cycles, cars and trampolines. It is important to know how much force springs can bear so that these things can be safe for people to use.

        Springs are used so much in everyday life because they are elastic. This means that when a force is exerted onto them they will change shape (stretch) and when the force is removed the spring will regain its original shape. There is a relationship between the force exerted on the spring and the extension of the spring, this is known as Hooke’s law, which states that:

                The extension of a spring is proportional to the force applied

This can also be expressed as:

                                        F = ke

                               Force (N) = constant x extension (mm)

The constant is the stiffness of the spring. A spring with a low value for k is weak and a spring with a high value for k is strong.

...read more.

Middle

Masking tape to attach the pin sized pointer to the spring1N weights

Fair Test (Variables and Constants)

I will make it a fair test by using the same apparatus throughout my experiment apart from the one variable I am changing which is the weight. I will vary the weight by increasing it by 1N each time. The variables that shall remain constant are the ruler, spring, clamps and pin-sized pointer. My input variable is the one I am exploring which is the weight. My output variable is the extension of the spring.

Range

I do not know the range of values I shall use because I will begin by using 0N and increase this by 1N each time until the spring is permanently deformed.

Method

The main steps for setting up the apparatus are:

  • Hang the spring from one of the clamps
  • Using the making tape attach the pin sized pointer to the loop at the bottom of the spring
  • Connect the ruler to the other clamp making sure the pin sized pointer is in line with the number ‘0’ on the ruler
  • Measure the original length of the spring
  • Gently place the weight in the loop at the bottom of the spring
  • Wait until the spring has stopped moving
...read more.

Conclusion

Accuracy

I think my results are quite accurate and allow firm conclusions to be made. Most of my results are close to the line of best fit. However the apparatus I used was not very accurate; the ruler I used was worn out at the ends so it did not measure exactly from 0, the pin sized pointer kept tilting so sometimes it was not pointing on the correct reading.

ReliabilityoftheEvidence

I think my results are quite reliable, if the experiment was repeated the same results would be obtained. I repeated my experiment twice to obtain a more accurate result and both sets of results are similar.

Suitability of the Procedure

Repeating my experiment over again and using better apparatus would help me obtain more accurate results. My experiment could also be made to be even more accurate by using different apparatus such as an ultra sonic measuring device.

Further Work

To find out more about how force affects the extension of a spring I could investigate springs in series and in parallel. This is where springs are combined to share a load.

...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. Determine the value of 'g', where 'g' is the acceleration due to gravity.

    The error from the stopwatch is �0.0001s, which is too small to be plotted on the graph of T2 against e. The error due to the reaction time is �0.05 seconds; this can be plotted on the graph of T2 against e.

  2. The aim of this investigation is to examine the effect on the spring constant ...

    and the base * A workbench * 10 springs of identical nature * 10 Standard Weights all of 100g mass The setup consists of a Stand resting on a work surface with a boss attaching a clamp to the stand.

  1. Measuring spring constant using oscilations of a mass.

    the other results, this probably means that the experiment was carried sufficiently and gave results within a required degree of accuracy of each other. Variations Of Repeats Or Uncertainty Of Data I did not need to repeat any of readings because I found them to be quite accurate and consistent

  2. Investigation on how putting springs in series and parallel affects their extension.

    than the single spring as its spring constant should be higher and the line of best fit for the springs in series should have a lower gradient than the line of best fit for the single spring as it should have a lower spring constant.

  1. Hooke's Law / Young's Modulus - trying to find out what factors effect the ...

    In the Hookes Law test there were no significant anomalous results. In terms of reliability the Hookes Law experiment was carried out 3 times then an average was taken and all results were very close together. However it occurred to me as the extension increased the difference between results rose

  2. Investigation of the relationship between extension of a spiral spring material per unit of ...

    Which increases the precision of the results. Whereas in systematic errors can be totally eliminated if better techniques and instruments are used. Which will increase the accuracy of the final result by a long way. Analysis conclusion Looking at the results that I have obtain you can see that there

  1. To investigate the relationship between the extension and the force added, whether they are ...

    60 150 mm 90 mm +15 350 60 165 mm 105 mm +15 400 60 180 mm 120 mm +15 450 60 195 mm 135 mm +15 500 60 210 mm 150 mm Average: Load (N) Original Length (mm) New Length (mm)

  2. Waves and Cosmology - AQA GCE Physics Revision Notes

    The allowed energy levels become closer together as the electrons moves to higher energies. These are the excited states that the electron can occupy. These energy are usually given in electron-vole (eV) * Ground state of the electron in a hydrogen atom is -13.6 eV, which is (-13.6 x 1.6 x 10-19)

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