What is the ball called in the game of ping pong?
It has no special name, it is a ping pong ball.
Among the only songs "about Ping Pong" are a 2007 Enrique Iglesias song called "Do You Know (The Ping Pong Song)." While not referring directly to the jargon of the game, the track has a sample of a ping pong ball bouncing in a steady rhythm throughout. The Raffi song "Bananaphone" also has a lyric "Ping-pong ping-pong, ping-pong, ping."
You have not defined the parameters of your problem. Ping pong balls never hit the ground, they hit the ping pong table. Even if they miss the ping pong table, they hit the floor, rather than the ground. That's because ping pong is played indoors. Of course, you could set up an experiment that involves a ping pong ball and a golf ball, but you have not described such an experiment.
Diameter of the ping pong ball should be 40 mm and the weight should be 2.7 gram. The ping pong ball must have 0.4 coefficient of restitution. Depending on the bounce, roundness and consistency of the ping pong ball, single star, two star or three star ratings are marked on the ball. A ball with a three star rating normally implies highest quality ball. www.amworld.info
According to open-site.org: "Table tennis was invented in England during the 19th century. It is unknown who invented the game but most likely it was adopted from the game of royal tennis ... In 1891, Charles Barter came up with the idea of a hollow cored ball ... He obtained a patent for the game and called it 'Ping-Pong' after the noise the ball made when struck with the paddle."
The ping pong robot help you practice your tale-tennis skills without needed a human partner. It has a camera that follows the ball as well as a mechanism for catching the ping pong ball and returning it to the player. Find the ping pong robot video and more over here: http://www.ipwner.net/ipwner/?s=ping+pong+robot