Some science question about ping pong in a train

I'm intrigue on this.

If we are playing a game of table ping-pong inside the car of a moving train, what will happen to the ball. Does the speed of the rain affects the behaviour of the ball? If I smack the ball forward in tandem with the direction of the car, what will happen? If someone return my ball against the direction of the moving train, again what will happen?

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David