Resilience of a material is important, when it is subjected to

ANS:C - shock loading

Resilience of a material is particularly important when it is subjected to shock loading. Shock loading refers to the sudden application of a load or force to a material, often resulting in rapid deformation or impact. In such situations, materials need to absorb and dissipate the energy from the shock to prevent failure or damage. Resilience is the ability of a material to absorb energy and deform elastically under shock loading, then return to its original shape once the load is removed, without permanent deformation or fracture. Materials with high resilience, such as certain types of steel and elastomers, are preferred for applications where shock loading is common, such as in machinery subjected to sudden impacts, automotive components, sporting equipment, and structural elements in buildings and bridges. These materials can effectively absorb the energy from sudden loads, reducing the risk of failure and prolonging the lifespan of the components or structures.