A physics instructor conducts a projectile motion demonstration. The device used will drop one steel ball and horizontally launch another. If no air resistance is presented which steel ball, the one launced or the one dropped, striked the ground first? (a) The launched ball

(b) The dropped ball

(c) both hit a the same time

(d) neither hit the ground

Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. The object is called a projectile, and its path is called its trajectory. The motion of falling objects, as covered in Problem-Solving Basics for One-Dimensional Kinematics, is a simple one-dimensional type of projectile motion in which there is no horizontal movement. In this section, we consider two-dimensional projectile motion, such as that of a football or other object for which air resistance is negligible.

Explanation:

B the dropped ball

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

a. are