Measurement of Young Modulus – Lab Report – cherryhhh
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Measurement of Young Modulus
Measurement of the Young modulesAim:The aim of this experiment is to measure the Young modules of copper wire.Method:Clamp the copper wire across the bench using the G clamp and the wooden blocks. Pull the wire until it is straight enough and put a standard weight to the lower end. Use the blue tag to act as a marker for the convenience of the measurement.Make sure the two ends are fully clamped between the blocks.Measure the length of the wire(L) from the clamped beginning to the end and the diameter of the wire using the micrometer.Increase the weight in small stepsRecord the position that the blue tag moved(△L) after each weight is added.Record the weight(m) when the wire extended.Keeping adding the weight until the wire broke and record the breaking point.Repeat the experiment for 3 times.Area of the wire is calculated by A=(0.5*d)^2The force of the weight(F) needed to be calculated by the formulae F=mg.Strain and stress of the wire need to be obtained by using the formula strain=△L/L, stress=F/AResults were recorded in the results table.Plot a graph of stress against strain.Calculate the Young modules(E) from the gradient of the graph.Result:Length:2020mmArea:2.34*10^—3Mass/gForce/NExtension/mmStrainStress/Pa1501.4714.95*10^—4628.212502.4529.9*10^—41047.013503.4341.98*10^—31465.817006.8652.48*10^—32931.629008.8262.97*10^—33769.23110010.787.53.71*10^—34606.84130012.74104.95*10^—35444.44150014.7157.43*10^—36282.05175016.66432.13*10^—27119.66Observation:It is difficult to record the position of the wire.The size of the wire makes it harder to measure.Conclusion:Our value for young’s module is 1.04*10^10Evaluation:
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By: cherryhhh
Submitted: November 10, 2016
Essay Length: 258 Words / 2 Pages
Paper type: Lab Report Views: 708
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