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GIVEN A BATCH OF FACTORY SPRINGS, ESTIMATE THE AVERAGE SPRING CONSTANT AND UNCERTAINTY OF THE BATCH. Outline plan I have been given 3 springs to which I will add different weight. Using the value of extension (?x) I will calculate the spring constant. Hooke's Law says that the stretch of a spring from its rest position is linearly proportional to the applied force (stress is proportional to strain). Symbolically, F = k?x Where F stands for the applied force, x is the amount of stretch (found by new length minus original length), and k is a constant that depends on the "stiffness" of the spring, called the spring constant. Trial plan Set up equipment as above. Measure original length of spring. Add weights 0.5N at a time until spring reaches elastic limit. Record extension (?x). Plot these results on a graph and use this information to gain a sensible number and range of values to use...

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