Have you ever sat down and thought “I wonder if a trebuchet could launch a projectile at supersonic speeds?” Neither have we. That’s what separates [David Eade] from the rest of us. He didn’t just ask ...

Suppose you throw some object near the surface of the earth. If the only significant force on the object is the constant downward gravitational force, we call this "projectile motion." Yes, that ...

I’ve started recreating many of my numerical model tutorials for introductory physics. In the beginning, I had students use spreadsheets to create models. Of course, spreadsheets aren’t very good for ...

Artillery is getting a speed boost at the US Army Dugway Proving Ground in Utah, where General Atomics Electromagnetic Systems (GA-EMS) test fired a hypersonic projectile multiple times using the ...

Figure 1: Formation of Copernicus crater by a low-speed impact. Figure 3: Impact velocity distribution on the Moon. The planetary geology community has not previously considered the possibility that ...

opened a new load, assemble and pack facility for 155 mm high explosive artillery projectiles on April 22 in Camden, Arkansas, reinforcing the Army’s strategic effort to expand production capacity, ...