"This ball is completely different. If you hit it the slightest bit wrong it can go anywhere," said Harte.
"But if you are 25-30 yards out goalkeepers are going to be worried.
"I hope to get some opportunities from that range in the World Cup.
"But I am just getting used to it at the moment and hope to get some more practice with the ball in training."
Reserve goalkeeper Dean Kiely, of Charlton Athletic, said the new ball could lead to some spectacular long-range goals in the World Cup.
"The whole property of the ball is geared towards movement and pace. Shots come at you a lot quicker," said Charlton's £1million stopper.
"I am pleased Ian is on our side and not against us because I think he will be able to do unbelievable things with the ball.
"The goalkeeper's perspective does not get taken into account at all.
"They want to see harder and faster shots with the ball moving a lot more and it makes for great viewing.
"We have had a week with the new ball and it does not take long to get your eye in really.
"Shots from distance will come at you quicker and movement on the ball will be exaggerated a little."