जब एक समरूप लोचदार पिंड (elastic body) पर एकसमान अक्षीय तन्य बल (axial tensile force) लगाया जाता है, तो इसमें क्या परिवर्तन होता है?

In the stress-strain relation within the elastic limit (Hooke's Law), the constant of proportionality relating axial stress to axial strain is called:

Calculate the strain energy stored in a metallic bar having a cross-sectional area of 2 cm2 and a gauge length of 10 cm, if it stretches by 0.002 cm under a gradually applied load of 10 kN.