Question

i have a task that i must presenting the matter about projectile motion, what's the point that i must presented?

Answer 1

One important concept in projectile motion is that motion in the vertical direction is independent of motion in the horizontal (i.e. perpendicular) direction.

Next is that there is no force acting on the projectile in the horizontal direction (if u neglect air drag) and the only force acting on the projectile is its own weight, which acts vertically downward.

And then based on these 2 fundamentals, you can derive equations for maximum height reached, time of flight, range of the projectile, angle for maximum range, and so on