this has been bugging me all day:

Say I have built a ping-pong ball bouncing machine. It is a very precise machine. It bounces a single ping-pong ball vertically at the highest speed that a ping-pong ball can travel (it is the theoretical upper limit for rate of travel by a ping pong ball). It constantly bounces the ball, and is so precise that it could be used as a clock.


now, I want to take my machine to a ping-pong ball bouncing competition, and to do so I need to take a train. I decide to take the newest train which moves at a constant velocity and is so well made that there is no jostling of any kind while the train is in motion.

As I am on the train I decide to show someone my wonderful machine. what happens when I turn it on?

does anything change if someone is stationary outside looking in through a window and watches my wonderful ball bouncing machine?


please explain your answer.

edit: i had diagrams but they didnt turn out too well
edit again: if there are any problems with the above experiment please let me know