Thursday 29 January 2015

Hooke's Law

     Hooke's law states that stress induced in a material, when it is loaded, is directly proportional to the strain produced with in the elastic limit of the material.




          where,
                     σ is Stress, 
                     Ɛ is Strain, &
                     E is the constant of proportionality and is known as 
                     Modulus of Elasticity or Young's Modulus.



Therefore, 


    



                ( because 
                Stress is force upon area i.e., F / A, and 
                Strain is change in length upon original length i.e., dl / l )






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