Data Analysis: Materials

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Science Coursework

Data Analysis

Aim of the Investigation

The aim of the investigation was to investigate the tensile strength of different materials. I chose to use tights which had a different denier.

Planning the investigation

I will be using three different types of tights (10 denier, 15 denier, and 40 denier) and I will be measuring the tensile strength of each of them. To measure the strength of each sample of material, I will use weights to see how far the different samples will stretch, and then I will use a ruler to measure how long the material has become. To make this a fair test, and to make fair comparisons between different material samples, I will need to keep some things the same. These are:

  • The length used of tights
  • The starting weight
  • The total weight added
  • Use the same apparatus
  • Use the same colour, brand and size (e.g. Small, medium, large) of tights

The one factor I will be changing in my test is the denier of tights. To make sure my results are dependable, I will repeat the experiment three times for each different type of tights and then work out the average. The apparatus I will need to use to carry out this test are:

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  • Clamp and stand
  • Newton weights
  • A weight holder
  • Ruler
  • Bulldog clips
  • Samples of 15 and 40 denier tights

Below is a diagram of the apparatus I would use and how I would set up the experiment:

It is important that I make sure my experiment and working area is safe. To make sure my experiment is safe, I will have to:

  • Wear safety goggles
  • Tie hair back
  • Keep feet under the table so if the weights ...

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