How do I for apply physics to bullet

I've always liked games cannons, but do not know how I can apply the correct physics, I have reviewed several tutorials but can not find anything, can you help me plz.

Thank ..^_^

Made this little capx as an example for you, just check how it works. It is pretty simple

ohh lord..1000 thank!!

and if the layer is longer ?....-

I mean, how changing the distance of the bullet in a layout size 2000px x 480px

Sorry for the inconvenience.

In this example I set the bullet speed to the distance between the cannon and the mouse/touch * 2.

2 is just a random number that i tought looked good in that case, you can adjust it for your needs, also, add a scroll to behaviour to the bullet so the camera follows it.

thank again.. now is ok...your are the best..!! thank for your time.

Made this little capx as an example for you, just check how it works. It is pretty simple

Thanks bro. Its help me too.