Question

The property of a body by virtue of which it tends to regain its original conifguration as soon as the deforming forces applied on the body are removed is called elasticity. Coefficient of elasticity, `E = (stress)/("strain") = (F//a)/(Delta l//l) = (F l)/(pi r^2(Delta l))` The value of E depends upon nature of meterial. A meterial with higher value of E is said to be more elastic. Read the above passage and answer the following question : (i) Which is more elastic steel or rubber ? Why ? (ii) What values of life so you learn from this concept ?

Answer 1

Steel is more elastic then rubber. This is because `E prop (1)/((Delta l))` Under a given deforming force `F, (Delta l)_(steel)lt (Delta l)_(rubber) :. E_(steel) gt E_(rubber)`
(ii) in day to day life, elasticity corresponds to adjustability of the person, which depends on his nature. From `E =(Strees)/("strain"),` we find, strian ` =(stress)/(E )` For a given stress in life, strain will be minimum when E is maximum. it implies that a person with adjustable//flexible nature will undergo minimum strain(tension) due to stresses (ups and donws) of life.