1. Horizontal Motion: This is the motion of the projectile in the x-direction. It is uniform meaning the projectile travels at a constant speed, as there is no force acting on it horizontally (neglecting air resistance).

2. Vertical Motion: This is the motion of the projectile in the y-direction. It is uniformly accelerated, meaning the projectile's velocity changes at a constant rate due to the force of gravity acting downwards.

These two components are independent of each other, meaning they don't affect each other. This is why a projectile follows a curved path, as its horizontal motion continues at a constant speed while its vertical motion is affected by gravity.