[bladedtoys]

Molecules are much lower density than black-holes. If an object were infinitely small, it would never be hit by physical collisions. If it were infinitely massive it would never be affected by them.

I would have thought that any model of a black hole in this scenario essentially approximates one of those conditions.

[whatshisface]

The black hole in this scenario is neither infinitely massive nor infinitely small... 10 times more massive than Earth and five cm across.

[nine_k]

A close enough gravitational interaction, even if not a collision, could do sufficient momentum exchange.