By itself no. With the king yes.
A question...
The key to R and K vs. K endgames is to force the king to the edge of the board and then use the rook to trap him there. Then follow the king with your king until they are directly opposed, then slide the rook over.
Really? How? Can you show me a diagram?
Can a rook mate in a K vs K+R endgame? Probably not...