Which of the following is most elastic? a) Steel b) Rubber c) Glass d) Sponge

Steel is more elastic.

What is Young’s modulus?

Young’s modulus defines the relationship between stress (force per unit area) and strain (proportional deformation in an object. A solid object deforms when a particular load is applied to it. If the object is elastic, the body regains its original shape when the pressure is removed.

  • If the same amount of force is applied to a steel wire and to a wire made of rubber of the same length and cross-sectional area, the extension of the rubber wire is easier than the extension of the steel wire.
  • So, it can be said that for a given amount of stress, the strain produced in the steel is comparatively smaller than the strain produced in the rubber and other given materials.

Further Reading

  1. What is the difference between stress and pressure?
  2. The Dimensional Formula for Youngs Modulus Is


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