18.1.4
The equations of constraints for the material points M1 and M2 of mathematical pendulums of constant l-const and variable l (t) of length have the form: x2 + y2 - l2 ≤ 0; X2 + y2 - [l (t)] 2 ≤ 0. In which figure is the holonomic nonstationary bond applied to the point? (Answer 2)