Question

Springs are usually made of steel but not copper. why?

Answer 1

because we can punch steal but cooper is hard

Answer 2

$\underline{\underline{\Huge\mathfrak{Answer-: }}}$

◆A spring will be better one, if a large restoring force is set up in it on being deformed, which in turn depends upon the elasticity of the material of the spring. Since the Young's modulus of elasticity of steel is more than that of copper, hence steel is preferred in making the springs.