Elastic materials are substances that can stretch or compress when a force is applied and return to their original shape when the force is removed. Common examples include rubber and certain types of plastics. These materials are characterized by their ability to absorb energy and deform under stress, making them useful in various applications, from everyday items like rubber bands to industrial components. The behavior of elastic materials is often described by Hooke's Law, which states that the force needed to extend or compress a material is proportional to the distance it is stretched or compressed. This property is essential in engineering and design, allowing for the creation of products that can withstand forces without permanent deformation.