What you’ll learn4 learning objectivesChoose one objective for a focused lesson, or study the complete topic.6.2.1The terms elastic deformation, plastic deformation and elastic limit• understand and use the terms elastic deformation, plastic deformation and elastic limitSyllabus objective6.2.2The area under the force–extension graph represents the work done• understand that the area under the force–extension graph represents the work doneSyllabus objective6.2.3The elastic potential energy of a material deformed within its limit of• determine the elastic potential energy of a material deformed within its limit of proportionality from the area under the force–extension graphSyllabus objective6.2.4EP = 1/2 Fx = 1/2 kx2 for a material deformed within its limit of• recall and use EP = 1/2 Fx = 1/2 kx2 for a material deformed within its limit of proportionalitySyllabus objective