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

Investigate Hooke's law, using masses and springs.

Extracts from this document...


Aim My aim is to investigate Hooke's law, using masses and springs. Background knowledge When weights are attached to one end of a spring it stretches. Hooke's law states that the extension depends directly on the load, that is: Extension (E) is proportional to the load (M) added. So if this is true doubling the load should double the extension. I know the limit of proportionality is when the spring becomes less stiff and the same force causes a greater stretch than below the limit of proportionality. If you carry on exerting a force on the spring then it looses its elasticity and will not return to its original shape. Prediction As the extension is proportional to the force (load) I think the spring will obey Hooke's law until the limit of proportionality. Plan I think the best way to display my results are in a graph because then you can see exactly how the spring obeys Hooke's law, you then also see where it reaches it's limit of proportionality. ...read more.


Here are some ways to make it safer: * You could wear goggles when placing more weights onto the mass holder. * Place the weights on at arms length. * Place the weights on the mass holder gently do not drop them on it. * Make sure the large weight holding the clamp on the table is secure and will not fall off. * When placing weights on the mass holder don't let anyone stand in a 2m radius of the experiment. * When the spring looks like it will break abort the experiment. Fair test Ways of making it a fair test are: * Trying to get springs that are the same strength. * Always using the same weight intervals. (100g) * Always try and read the ruler from the same point. * I will do the experiment 4 times because you then have a smaller chance of having errors and if you have a bad reading you can compare it with the rest. * To make it a fair test whenever I start the experiment I will always finish it, and if for some reason I can't, when I come back to it I will start it again. ...read more.


- Biggest = 3.72 - 3.95 = -0.23 - = Average ext. - Smallest = 3.72 - 3.375 = 0.35 From this I can see my largest error to be only 0.35cm. I can extend this to say my experimental error is +/- 0.35cm per 100g extension. Because this figure is small it shows I have executed the experiment reliably. Evaluation The results that are in red I have ignored because they do not follow my pattern and are anomalous results. A reason for them being like this could be due to the error of parallax. This is shown below: If I were to repeat the experiment I would try to minimise the magnitude of errors by using a more accurate method of measuring the extension. At the moment I am just using a ball of plastercine and a paper clip, there are many ways of decreasing the margin of error for example using lasers but this is prohibitively expensive and add an added danger. For the amount of reduction in error this would be pointless as there is always going to be a slight error. Conclusion I have found that the extension is proportional to the load and therefore I have satisfied my original prediction. ...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

See related essaysSee related essays

Related AS and A Level Waves & Cosmology essays

  1. Hooke's Law.

    Another measure I am taking is that I shall not be the only one to take readings from the metre rule; I shall have two other peers who will also be reading off the same metre rule. From these 3 readings I shall draw up averages of level of weight applied to the spring.

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

    test, as I used identical springs, identical weights and added 1N extra weight for each reading when measuring all three arrangements of springs, I also ensured that none of the springs exceeded their limit of elasticity . I think that my readings of the extension of the single spring and

  1. The Stiffness Of Springs

    a maximum of 6 N as this will give me enough results to plot a suitable graph. A Table showing the actual masses of the masses I used in this experiment, measured on electric scales. Mass no. Actual mass (g)

  2. Stretching Springs/Hookes Law.

    He served as assistant to the physicist Robert Boyle, and helped Boyle in the construction of the air pump. In 1662 Hooke was appointed curator of experiments of the Royal Society and served in this position until his death. He was elected a Fellow of the Royal Society in 1663

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

    I would also create another graph to show load vs. tension. This would show the relationship in how the load would affect the tension and so this would be useful as I could again use it in my analysis to help me explain my predictions.

  2. An Experiment To Examine the Effect of Springs In Parallel

    (By increasing the number of springs and keeping the weight constant less, force will be acting on each spring, meaning less force will be acting on each molecule). Mathematically I would say the extension of springs in parallel is the original extension with just one spring divided by the number of springs that you are looking at.

  1. Investigation into the elasticity of a set of springs under differing conditions.

    in parallel or in series. For example when the springs are in series the spring stiffness should halve and when two springs are in parallel then the spring stiffness will double. This is because when the force is kept at a constant and the extension decreases then the stiffness increases.

  2. Study the interference of light using Helium - Neon Diode Laser.

    The center of the fringes is at O, where the perpendicular bisector MO of S1 S2 meets T. Here the path difference S2O - S1O = O, since the paths are equal. On either side of O, the fringes cover only a very small distance as the wavelength of light is very small.

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