There's no single answer to how fast a cannonball can travel. It depends on a lot of factors, including:

* The cannon: Different cannons have different sizes, barrels, and powder charges.

* The type of cannonball: Heavier cannonballs will travel slower than lighter ones with the same force.

* The angle of firing: The angle at which the cannon is fired significantly affects the speed and distance of the cannonball.

Here are some general ideas:

* Early cannons: Could launch cannonballs at speeds around 500-600 feet per second (150-180 meters per second).

* Later, more powerful cannons: Could achieve speeds of 1,000 feet per second (300 meters per second) or more.

For perspective:

* A typical car travels at about 60 mph (97 km/h), which is about 88 feet per second (27 m/s).

* A bullet from a modern rifle can travel at speeds exceeding 2,000 feet per second (610 m/s).

So, a cannonball could travel at a speed comparable to a modern car, and in some cases, even faster.