On a personal level, it all depends on your skill.
As a comparison, the fastest a professional has hit a forehand was 120 mph (by Gael Monfils), and 155 mph on a serve (by Andy Roddick).
The ball itself can travel as fast as a force exerted on it can send it. This can range from 1 mph to 1,000 mph.
An average first serve speed for male professional tennis players is about 120 mph, but it has been observed to be as fast as 155 mph (Andy Roddick, USA). Likewise, a male professional player's second serve speed can vary, but it is on average about 92 mph.
An average male professional tennis player's shot speed is about 70 mph, with fast-paced winners increasing to speeds up to 110 mph (although it can be higher on rare occasions).
Obviously, each shot can vary in speed depending on the kind of shot being hit, the speed of the ball before it makes contact with the racquet (depending on whether the shot is a return of the opponent's shot or not), whether the player is male or female, the player's age, the player's experience, and the player's physique.
Reiterating the basic answer to the original question, there is no limit to the speed a tennis ball can travel.
The speed of the ball can vary from slow serves with much spin to smashes that travel as fast as 112.5 kilometers per hour (70 mph).
no it doesn't at all
Yes, of course. The material a tennis ball is made out of is porrus. That is why tennis balls go flat.
A new tennis ball will bounce higher. Old tennis balls are considered "dead."
An example might be - Tennis is a fast-paced sport. Another example is - The tennis ball shattered the window.
It will go as fast as it's terminal velocity
in hours or days
It depends. If a tennis balls are hit with the same amount of force, then the dry tennis ball will travel faster and farther. However, if the two tennis balls begin traveling at the same speed, then the dry tennis ball will slow down more rapidly than the wet tennis ball. The reason is the added mass of water. It would take more force to make the wet tennis ball fly as fast as the dry, but the added mass also requires more force to slow down the wet ball.
180 kilometers per hour
a tennis ball
You need to know the area of the glass, its span, how it is supported, and how thick it is; also you need to know the stiffness of the tennis ball; so this is a complex problem.
A tennis ball.
A tennis ball.