need help with physics

[gritty hound]

i got a task to make one object bounce off another, but have no idea how to do the same, when at least one object should keep on point and another one "dethrone" him
can you help me pls?
i tried a lot of solutions with velocity, direction calculating and etc.

here is an example

more info:

1. the objects are clusters of multiple random placed cubes
2. magnet point doesn't have a collider
3. other things like coloring and timer with count doesn't matter