Question

Движения медленны или медлены?

Answer 1

Правильно движения медленны

Answer 2

Both "движения медленны" and "движения медлены" are grammatically correct in Russian, but "движения медленны" is more commonly used. The word "медленны" is in the nominative case and agrees with the plural noun "движения" (movements). However, both forms convey the same meaning of "movements are slow."