Question

Write Copper, Steel, Glass and Rubber in order of increasing coefficient of elasticity.
A. Steel, Rubber, Copper, Glass
B. Rubber, Copper, Glass, Steel
C. Rubber, Glass, Steel, Copper
D. Rubber, Glass, Copper, Steel

Answer 1

Hint: Elasticity is the ratio of the applied stress to the change in shape of an elastic body. It increases with the amount of stress applied. Hard metals have less coefficient of elasticity.

Complete step by step answer:
Elasticity is known as the ability of an object or material to resume its normal shape after being stretched or compressed. Rubber is an elastic material because it retains its original shape after being compressed or stretched.
Coefficient of elasticity is a quantity that measures an object’s resistance to being deformed elastically. We are given Copper, Steel, Glass and Rubber. Out of these obviously rubber is the more elastic object. Therefore, it has the coefficient of elasticity which is between 0.1 and 0.01.The Coefficient of elasticity of glass is between 50 and 90; the Coefficient of elasticity of steel is 210; the Coefficient of elasticity of Copper is 120.Therefore, the rubber is more elastic than glass and glass is more elastic than copper and copper is more elastic than steel.
The increasing order of Coefficient of elasticity will be RubberThe correct option is Option D.

Note:We might think that rubber is more elastic so it can have a large coefficient of elasticity. But it is not. The more hard and brittle the objects are the more coefficient of elasticity it will have. The elasticity is inversely proportional to the coefficient of elasticity.