What would be a good way of making a cannon shell fire and drop off at certain time

[PerilousPanther]

EgoMoose did a fantastic guide on projectile motion a while ago. If you can understand basic calculus then that would be the best resource:

Modeling a projectile's motion

This guide was originally written for scriptinghelpers. The original can be found here. As a somewhat active member of the Scripting Helpers discord one of the most common questions I see is how to have a projectile travel an arc. Most people want to know how to do this for things like basketballs or cannon balls and so forth. Since this is such a popular question I thought it would be worth writing a blog post on it and talking about a few other things we can extend from our findings. Deri…

You use velocity, a property of any basepart to move instances:
https://developer.roblox.com/en-us/api-reference/property/BasePart/Velocity