In this essay I am going to find out young’s modulus of a fishing line. I will be doing so having conducted an experiment. With the use of diagrams , tables ,and with a graph. By using Young’s Modulus I am going to determine the resistance and it’s ability to stretch. This experiment can help determine the usefulness of the fishing line. The stress and strain of a material is proportional to each other , stress divided by strain is a constant. This constant is YM. If we know the force of mass applied to the line , and the area of the line , we can calculate the stress. Measure the length of the line , then perform the experiment to observe the change in length , to get the strain. Thereafter, by using the formula Y.M =stress/strain to calculate the Young’s Modulus. However, there is going to be a percentage error we will have to consider.