ny32182
Member
What is the exact formula to get muzzle energy in ft/lbs from bullet weight in grains and velocity in ft/sec?
Ummm no. The desired outcome is that you kill the guy or at least get him to stop shooting at you. You cannot make the claim that kinetic energy (or momentum) is a direct measure of the likelihood of either of those two things. The best you can say is "as the trend..."Energy delivered to the target is the desired outcome.
No again. Kinetic energy and momentum have a derivative relationship. They are not the same thing anymore than acceleration and velocity are the same thing. Plus kinetic energy is a scalar and momentum is a vector which is important because it changes the whole nature of conservation of these values. Energy must be conserved but kinetic energy does not. Momentum must always be conserved.Hmm, kinetic energy is 1/2 mass * (velocity squared), as given above. Momentum is m * v. So they describe the same thing. You can't get more or less of one without the other. As it happens, kinetic energy is a "scalar" value while momentum is a "vector" (requires a direction to be complete). But that doesn't matter here since we know what direction the bullet is travelling.