Define (i) Elasticity; (ii) Young's modulus; (iii) Force constant.

Explanation

(i) Elasticity is the ability of a material to regain its original shape or size after deformations. OR after removal of stress force, OR after it has been 1 compressed.

(ii) Young's Modulus is the ratio of tensile I or compressive stress to tensile or compressive strain

(iii) Force constant = the amount of force that causes a unit extension of an elastic material. OR

\(\frac{Force (F)}{ Extension(e)}\) of an elastic material.