# 9.2: Introduction


An object that is launched outward from a height above the ground will follow a curved path.  The curved path of a projectile is a combination of the horizontal motion it is given and the effect of gravity on the object.  A projectile launched horizontally, parallel to the ground, is dropping at the same time as it is traveling horizontally, and the result is a curved path.

The ball will travel a distance in the horizontal (x) plane while it is dropping in the vertical (y) plane.

Horizontal Motion:

$x = vt \nonumber$

Vertical Motion:

$t = \sqrt{\dfrac{2y}{g}} \nonumber$