Why we study physics ?

To know what is it. and i think that the reason behind your question is that PHYSICS IS DAMM HARD

In my opinion help us to have a better knowledge of how things works basically by mechanism of forces, and why they work that form and physics help us to understand mostly everything that deal with everyday life, for example when youre walking in street you are appreciating more than two force, gravity, inertia, kinetic energy, normal force that the soil is exerting on you and others and physics will help us to understand the universe and its qualities

Kiloleter, mega leterhope this !

Since you have not included the experiment situation and the data, of course, i can not give you specific details about it. but i can you with this question.1) i will assume that the motion is projectile (parabolic) motion.2) yes, the horizontal distance depends on the horizontal velocity as, naming vx the horizontal velocity and t the time, it is: x = vx × t3) now, observe that the flight time depends on the vertical velocity as, naming voy the initial vertical velocity, t the time and y the vertical distance before reaching the ground: y = yo + voy×t - gt² / 2.the higher the initial vertical velocity (voy) the longer the object will be flying and so t will be higher in the equation for the horizontal distance.that explains the relationship between the horizontal distance and the horizontal velocity.