grammar - 'That's how Physics work' or 'That's how Physics works'

Do you say 'That's how physics work' or 'That's how physics works'?

The former one seems more intuitive and has a high chance of making it into a conversation but the latter one seems correct too. Or is it that they are both correct?

Considering you are talking about physics as discipline in the context of the latter while you're discussing the multitude of possibilities within physics in the case of the former.

Googling this made it pretty clear that native speakers use both these terms.