Can someone tell me how does cannon works?

Preparing the cannon for firing started with placing a cartridge of black powder. In order to get the cartridge to the bottom of the tube a pushed into the tube, breach, with a rammer.When it is time to fire the cannon the rope on the frictionion primer is pulled. The serrated wire creates enough heat from friction to ignite the black powder that is in the primer tube. Aiming the cannon is done by pointing the piece, the cannon, with a breech sight for the up and down elevation and the cannon was moved left or right for lateral positioning.

F  you double the  force, you double the acceleration, but  if  you double the  mass, you velocity. all bodies accelerate at the  same  rate regardless of size or  mass.