Two similar springs, of spring constant k each, hang vertically downward from a rigid support with two equal masses 'm' attached to them as shown in the diagram below. The normal mode frequencies of small oscillation along the vertical direction, will be m eeeeeeeeeee L (3-5). (3-5) + m k 2m k 3k 2m 2m k (3+5).. -(3-5) k 2m m 3k m