Comment Comment by 0_____0 wouldn't need to be a boulder at those speeds. energy goes up with the square of velocity50g @ 460m/s = 5290J25kg @ 50m/s = 31250Jthat is to say, the small but fast projectile is 1/6th the energy but only 1/500th the massedit: formattingedit2: a 300g projectile at 460m/s would have approx the same energy as a the 25kg boulder at 50 m/s. at point blank range anyway. parent 0_____0 5 years ago
50g @ 460m/s = 5290J
25kg @ 50m/s = 31250J
that is to say, the small but fast projectile is 1/6th the energy but only 1/500th the mass
edit: formatting
edit2: a 300g projectile at 460m/s would have approx the same energy as a the 25kg boulder at 50 m/s. at point blank range anyway.