This is the 952nd most frequent Polish word.
potrzebne
"Potrzebne" means "needed" or "necessary" in English.
In this sentence, 'potrzebne' means 'needed' and it is used in the context of necessity for an action, i.e., studying.
Książki są potrzebne do nauki.
Books are needed for studying.
Here, 'potrzebne' expresses the idea of requirement or necessity being addressed to a specific group of people (you, plural).
Czy są wam potrzebne nowe narzędzia?
Do you need new tools?
In this sentence, 'potrzebne' conveys lack of necessity or requirement regarding the additional information.