Solution of task 18.1.2 from the collection of Kepe OE

Solution of task 18.1.2 from the collection of Kepe OE

18.1.2
Material points 1 and 2 move in space. On the material point 1 there is a connection, the equation of which has the form x2 + y2 + z2 - 25 = 0. The sledge imposed on point 2 has the form x2 + y2 + z2 - 25 t2 ≤ 0. Specify the point number on which the holonomic Restraining communication. (Answer 2)