# YOUNGS MODULUS

Jun 17th, 2015
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Young modulus is named after Thomas young (1773-1839) who developed the Young modulus a constant in the mathematical equation used to determine the stiffness of a material. The Young Modulus of wire, E is a measure of the stiffness of a material, it is widely used by engineers when considering the properties of different materials in construction

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Youngs ModulusZahra PervezBackground PhysicsAimTo determine the youngs modulus of elasticity of the given material.Theory Young modulusYoung modulus is named after Thomas young (1773-1839) who developed the Young modulus a constant in the mathematical equation used to determine the stiffness of a material.The Young Modulus of wire, E is a measure of the stiffness of a material, it is widely used by engineers when considering the properties of different materials in construction as a Youngs Modulus is defined by the equation: E= . Stress is defined as= ,where F is the force applied and A is the cross sectional area. Strain is defined as , where E is the extension of the wire and L is the original length. The equation for Young Modulus can also be written as E= , where F is the applied force, E is the extension, A is the cross-sectional area and L is the original length.Stress strain graphsStress () can be plotted against strain (). The toughness of a material is equal to the are under the stress strain graph, between the y-axis and the fracture point. The image below shows a stress strain graph for a typical ductile material.ApparatusPiece of wire (wire must be undamaged)Four blocks of wood( two large blocks are needed to clamp the wire to one end of the bench, two smaller blocks are needed to clamp to the wire at the other end where it is loaded.)Two g clamps (a large one is required

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