Although the human population is dwindling, we are on planet earth! No anomalies have altered our general understanding of physics. We still have or gravitational constant, g = 9.81m/s2. The normal Earth kinematic equations still hold true. The weapon evaluation will involve momentum. The kinematic equations and basic projectile motion are seen in figure 2. The equations can be found at physicsclassroom.com and within Physics For Scientists and Engineers: A Strategic Approach by Knight, Randall D.
 

Figure1.

Figure 2.

Photo Courtesy of Savanah Owen