you want to make an artillery style mini-game?
the answer to your question is very subjective,
RPGmaker MV doesn't have any of that kind of logic or programming.
it really depends on how far you want to go with this, without a plugin of sorts you could make an event where you set numbers (Number Input) to dictate angle and velocity,
however Events can only move by tiles (48x48 pixels). so whatever your throwing / shooting will also have that limitation.
this makes it difficult to even show the player what the shot is like. since a tile is equivalent to like 2 meters unless you make the map large enough to accommodate such a game.
Now artillery games usually make their rounds or bullets follow a parabolic trajectory basically to simulate gravity. I have no idea how you would do this in events alone. my only guess is to use a picture and have that move along a calculated line. remember though Pictures uses Screen Coordinates, which makes it a nightmare if you have to scroll the map in this game.
I guess the main question is how and where do you want this minigame to function.
to break it down.
-Is it in the Map using Events or another Scene?
-Does this Object travel in a straight line, parabolic or something else? will it even be visible?
-How do you want to the player to set the velocity and angle? remember number inputs only limit the digits not the nubmers themselfves e.g 99 Degrees you're shooting backwards.
-What do you want it to look like. the object, the player throwing it, animations? an explosion should it land (maybe they're throwing bombs?)
-How do you want check if the player hits, is it a velocity and angle range check or do you need the object if visible to actually collide with the target?