Clasic Jerk: vmax_junction calculation doubt

I am studying the clasic vmaxjunction calculation. I will ilustrate the question with the next example. I start with Vexit = (50, 0) and Ventry = (70, 30). Vexit is previus block nominal speed , and Ventry is current block nominal speed. The max jerk for the all axis is 10. If I compute de Vmaxjunction with marlin, the result is |Vmaxjunction| = 16.666666. Its for Vexit is (16.66666, 0) and for Ventry is (15.319084, 6.5653216).
Why not |Vmaxjunction| = 25.385910? is Vexit = (25.385910, 0) and Ventry =(23.333333, 10). The last, maximize the jerk on axis Y.

Edited 1 time(s). Last edit at 08/14/2020 01:28PM by Roydudu.