Questions & Answers about Ons moet nou ingaan.
It can mean either, depending on context.
In English, must can sound stronger or more formal, while have to is often more natural in everyday speech. Afrikaans moet covers both ideas very often.
So Ons moet nou ingaan could be understood as:
- We must go in now
- We have to go in now
The exact feeling depends on the situation and tone of voice.