Question

a target practice a person aims a gun horizontally at a target distance D away. the bullet leaves the gun with the velocity. by how much does the percent miss the target

Answer 1

The bullet is basically a projectile with launching angle 0 degree. So the equation of horizontal projectile is

The target is D m away from the person. As it travels through D, it falls down through a vertical distance of y. So the distance y if the velocity of projection is v is given by

The bullet misses the target by this distance.