Solution of task 18.1.4 from the collection of Kepe OE

Solution of task 18.1.4 from the collection of Kepe OE

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)