2 identical pices of steel wire of equal length were used to manufacture two springs. Diameter of the first spring coil was d, diameter of the second was 2d. Both springs were then loaded with the equal masses. As a result, the first spring stretched out to the one tenth of its initial length.

What was the percent elongation of the second spring?

 

Any of you genuises know how to solve this question

 

Hope i put it in the rite section.

I havent done a question like this, but i presume you will have to find the spring constant as a function of a spring coil diameter.

This link may well help.

http://www.engineersedge.com/spring_tension_calc_k.htm