What words seem to you the most important in defining the material point? Give your schoolmate examples of situations

What words seem to you the most important in defining the material point? Give your schoolmate examples of situations in which real objects can be considered material points. Consider situations in which the material point model cannot be applied to these objects.

The most important words are in the context of a given task, i.e. depends on what exactly needs to be calculated.
An airplane can be considered a material point if we observe it from the surface of the Earth, but not if we are in it.