9mm (usually called 9mm Luger or 9mm Parabellum) almost always has a higher muzzle velocity than the 380 ACP (also called the 9mm short, 9mm Kurtz, and 9mm Corto). The two bullets are essentially the same diameter however the 9mm Parabellum is almost always a heavier bullet than the 380 ACP with a larger powder charge and a significantly higher chamber pressure.
.30 vs .355
.30 vs. .355
Weapon loads at the breech vs. the muzzle.
Weapon loads at the breech vs. the muzzle.
No, acceleration is the rate of change of velocity with respect to time. It is the derivative of the velocity function, not the slope of the velocity vs. time graph. The slope of the velocity vs. time graph represents the rate of change of velocity, not acceleration.
Your acceleration vs. Time graph is the slope of your velocity vs. time graph
less power vs more power all else being equal.
No, displacement is the area under the velocity vs. time graph. The slope of a velocity vs. time graph represents acceleration.
.355 vs .40
The position vs time graph of an object shows its location at different times, while the velocity vs time graph shows how fast the object is moving at those times. The slope of the position vs time graph represents the velocity on the velocity vs time graph.
Yes!
Of course a 45 is more powerful, but the 9mm has the advantage of speed and a larger chamber. If you only get one shot, pick 44. Multipule. Then pick 9mm