Determine the change in length of the string. This is written as.
A Level Physics Stress Strain And Young S Modulus A Level Physics Stress Physics Online
In this article we will discuss its concept and young s modulus formula with examples.
Physics young s modulus formula. Young s modulus y is the elastic modulus when deformation is caused by either tensile or compressive stress and is defined by equation ref 12 33. Elastic modulus or young s modulus definition. Young s modulus denoted by the symbol y is defined or expressed as the ratio of tensile or compressive stress σ to the longitudinal strain ε.
The ratio of stress and strain called modulus of elasticity or elastic moduli. We have y f a l l f l a l as strain is a dimensionless quantity the unit of young s modulus is the same as that of stress that is n m or pascal pa. The young modulus for a wire can be measured using this equipment.
It compares the tensile stress with the tensile strain. The reference wire and test wire are hung from the ceiling. It quantifies the relationship between tensile stress force per unit area and axial strain proportional deformation in the linear elastic region of a material and is determined using the formula.
A modulus is a numerical value which represents a physical property of a material. Young s modulus of the string 5 x 10 9 n m 2. Young s modulus is also termed the modulus of elasticity.
Let us learn the interesting concept. Young s modulus also referred to as the elastic modulus or tensile modulus is a measure of mechanical properties of linear elastic solids like rods wires and such. We are giving a detailed and clear sheet on all physics notes that are very useful to understand the basic physics concepts.
Dividing this equation by tensile strain we obtain the expression for young s modulus. Young s modulus force no stress length area of a section change in the length the equation is. There are other numbers that give us a measure of elastic properties of a material like bulk modulus and shear modulus but the value of young s modulus is most commonly used.
Young s modulus is a numerical constant named after the 18th century english physician and physicist thomas young. Diameter d 1 cm 0 01 m. Young s modulus the young modulus or the modulus of elasticity in tension is a mechanical property that measures the tensile stiffness of a solid material.
Y σ ε. The string is pulled by a force of 200 n. Young s modulus is used to represents how easy it is to deform a material.
Original length l 0 2 m. A string has a diameter of 1 cm and the original length of 2 m. Force f 200 n.
Young s modulus is a measure of the ability of a material to withstand changes in length under lengthwise tension or compression. Elastic modulus in physics definition formulas symbol units elasticity. Young s modulus or elastic modulus or tensile modulus is the measurement of mechanical properties of linear elastic solids like rods wires etc.
Young s modulus e 5 x 10 9 n m 2. E the young modulus in pascals pa f force in newtons n l original length in metres m a area in square metres m 2 d l change in length in metres m measurement of the young modulus.
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