78. When hanging cargo masses m1 = 600 g and 400 g m2 = springs to free the last lengthened the same (l = 10 cm). Neglecting the mass of the spring, determine: 1) the period of oscillation of the load; 2) some of the goods at the same amplitudes have more energy and how many times.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)