A body freely falls from a certain height onto the ground in a time ‘t’. During the first one third of the interval it gains a kinetic energy ${\mathrm{\Delta k}}_1,$ and during the last one third of the interval, it gains a kinetic energy ${\mathrm{\Delta k}}_2,$  The ratio${\mathrm{\Delta k}}_1:{\mathrm{\Delta k}}_2$  is