Calculations on projectiles

 

For what? Navy shells?

https://en.wikipedia.org/wiki/Mathematical_discussion_of_rangekeeping

 

Do you have a specific question?

 

Google projectile motion. There should be lots of physics sites that introduce this topic.

In its simplest form, you treat it as a 2-dimensional problem.
A projectile is launched with an initial velocity of v0 at an angle θ.
You divide the problem into two problems, one in the x-direction and the other in the y-direction.