1) The increase in energy of a metal bar of length L and cross-sectional area A when compressed with a load M along its length is (where, Y= Young's modulus of the material of metal bar ) A) FL2AY B) F2L2AY C) FL2AY D) F2L22AY Answer: Option BExplanation:Energy = 12 x stress x strain x volume = 12(stress)2Y×volume =12(FA)2Y×LA [ as stress = F/A, volume = L x A] or energy (E)= F2L2AY