Question

Why is a baseball thrown by a pitcher considered to have projectile motion?

Answer 1

It has a horizontal and vertical motion would be correct. Horizontal and vertical are projectiles.

Answer 2

It has horizontal and vertical motion.

Explanation:

A projectile is an object which moves in a parabolic path consisting of two independent motions:

- a horizontal motion, which is a uniform motion with constant speed

- a vertical motion, which is an accelerated motion with constant acceleration $g=-9.81 m/s^2$ directed towards the ground

In this case, the baseball has exactly this kind of motion, so it can be considered to be a projectile.