Adjectives have two types of uses: attributive and predicative. By predictive we mean not before the word to be qualified but after it or somewhere further. For example:
- Postmaster General
** Persons concerned
It will be seen participles are used predicatively often to highlight the impact or to bring a modulation in meaning. CONCERNED PERSONS (in the sense worried/anxious) are not PERSONS CONCERNED (in the sense related or linked).
The comments above by the learned commentators are exhaustive and illustrative as to the way participles make room for themselves in a sentence.
Suffice it to say participles are 'verb-adjective'— born of verb, work as adjective / partly verb, partly adjective.