(1) The motion of a projectile is a two-dimensional motion. So, it can be discussed in two parts. Horizontal motion and vertical motion. These two motions take place independent of each other.This is called the principle of physical independence of motions.
(2) The velocity of the particle can be resolved into two mutually perpendicular components. Horizontal component and vertical component.
(3) The horizontal component *** unchanged throughout the flight. The force of gravity continuously affects the vertical component.
(4) The horizontal motion is a uniform motion and the vertical motion is a uniformly accelerated **** motion.
