REQUIRED PRACTICAL 4 - Young's Modulus Experiment

REQUIRED PRACTICAL 4 - Young's Modulus Experiment Step 1 - Correct Answer 1. find cross sectional area (πr²) of the wire, using micrometre, find diameter at different 90° along the wire - find the average diameter. before you start - Correct Answer do a pilot experiment to find the limit of proportionality, you won't pass it in the experiment. Step 2 - Correct Answer clamp the wire to the bench, then position it on the pulley Step 3 - Correct Answer measure starting position of the wire with a millimetre ruler and marking it on the wire. Step 4 - Correct Answer measure the distance between the the fixed end of the wire and the marker = unstretched length Step 5 - Correct Answer increase the weight in intervals e.g 100g, measure extension each time Step 6 - Correct Answer use results to plot a stress, F/A - strain, ∆L/L graph