![]() ![]() Let OX be a horizontal line on the ground and OY be a vertical line: O is the origin for X and Y-axis.Ĭonsider that a projectile is fired with velocity u and making an angle θ with the horizontal from the point ‘O’ on the ground The entire trajectory is near the surface of the earth. ![]() The effect due to the curvature of the earth is negligible.To study the motion of a projectile we assume that: Projectiles can be thrown in various ways on level ground, from a high tower to ground, from an airplane etc. The force of gravity continuously affects the vertical components so the vertical motion is a uniformly accelerated motion.The horizontal motion is a uniform motion. Thus, in projectile motion the horizontal component of velocity remains unchanged throughout the motion. If acceleration in a particular direction is zero then velocity in that direction remains the same. The velocity of the projectile can be resolved into two mutually perpendicular components the horizontal component and the vertical component. ![]() These two motions take place independently of each other.
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