Answer:- The resilience of an elastic body is its capacity to withstand a mechanical shock or a sudden blow without acquiring a permanent set.It is measured by the work done in subjecting the body to a strain within the elastic limit.
Answer:- The workdone or energy spent on the body by deforming force remains stored up in the body in the form of potential energy called elastic potential energy or strain energy.
Answer:- The ratio between the lateral strain and linear strain due to a given tensile or compressive stress, within the elastic limit is found to be a constant called Poisson's ratio for the material of the body.