Since force is related to a change in momentum and not necessarily just to a change in velocity, what would be an example where only the mass of a body changes but not its velocity when subjected to a force?

Question

Since force is related to a change in momentum and not necessarily just to a change in velocity, what would be an example where only the mass of a body changes but not its velocity when subjected to a force?

In: Physics

Answer 1

Totally prepared to get this wrong but would this be like a rocket or helicopter hovering? Using fuel to stay in the same place?