freedom of the seas conjunction of fanboys

a cannon ball

the explosion of gunpowder behind it propells it out of the cannon.

The forces are equal in both directions. The momentum of the shot is also equal to the

momentum of the cannon in the other direction.

The backward velocity of the cannon is:

(forward velocity of the shot) times (mass of the shot) divided by (mass of the cannon).

Cannon balls are made of iron, which is a high-stress material. A high-stress material resists breaking. Because the cannon has an open end, and the iron ball resists being torn apart, the cannon ball is shot out instead.