Ok, I'm confused. My not-so-uber knowledge of physics suggests that recoil should be much more violent than it really is.
Let's suppose you are shoot a 45 ACP round. That means the bullet weighs about 15 grams and goes about 288 meters per second.
Kinetic energy is 1/2 (mass)(velocity)^2.
So the total kinetic energy is 1/2 (.015kg)(288)^2 = 622 Joules
For every action there is an equal and opposite reaction. Let's assume that *all* of that energy goes into recoil (is this where I'm going wrong). In the real world some of that will go into the slide and perhaps elsewhere. And let's suppose that the shooter weighs 80 kilos (a normal sized guy).
Then we use the formula for kinetic energy and solve for velocity.
1/2 (80)v^2 = 622
velocity = 3.94 mph
That doesn't make any sense. The recoil of a gun makes your hand go back at about that speed, not your whole body. If you were shooting on ice skates you'd get launched backwards like how the guy who gets hit by a shotgun in the movies gets launched.
What am I doing wrong? Or do handguns really generate that much recoil, and it's just that you are braced and gets lost in the friction on the ground?
Let's suppose you are shoot a 45 ACP round. That means the bullet weighs about 15 grams and goes about 288 meters per second.
Kinetic energy is 1/2 (mass)(velocity)^2.
So the total kinetic energy is 1/2 (.015kg)(288)^2 = 622 Joules
For every action there is an equal and opposite reaction. Let's assume that *all* of that energy goes into recoil (is this where I'm going wrong). In the real world some of that will go into the slide and perhaps elsewhere. And let's suppose that the shooter weighs 80 kilos (a normal sized guy).
Then we use the formula for kinetic energy and solve for velocity.
1/2 (80)v^2 = 622
velocity = 3.94 mph
That doesn't make any sense. The recoil of a gun makes your hand go back at about that speed, not your whole body. If you were shooting on ice skates you'd get launched backwards like how the guy who gets hit by a shotgun in the movies gets launched.
What am I doing wrong? Or do handguns really generate that much recoil, and it's just that you are braced and gets lost in the friction on the ground?