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Testing Materials Coursework Tommy Patton Plan In this investigation we are going to measure the tensile strength of four different materials, these are: * Elastic * Wool * String * Plastic fishing wire We will measure the tensile strength in grams and kilograms. To make sure that the comparisons we make are fair we are going to repeat the investigation 3 times for each sample of material, use the same apparatus throughout the investigation, use the same weights for each sample and use the same length of material for each sample. For this investigation we are going to use a clamp stand, a hook, a cotton reel, a clamp and weights. We are going to put the clamp stand on the bench and place the cotton reel, with the sample tied around it, in the clamp. We will then increase the load on the material until it breaks and finally we will measure the load needed....

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