Center Of Mass

Two massless springs of spring constant \(\mathrm{K}_1\) and \(\mathrm{K}_2\) are connected one after the other forming a single chain, suspended vertically and certain mass is attached to the free end. If '\(e_1\)' and '\(e_2\)' are their respective extensions and '\(\mathrm{f}\)' is their stretching force, the total extension produced is