引用:
原帖由 7285 於 4-3-2011 15:08 發表 
唔知會唔會off topic
0.25g 1.3j同0.2g 1.3j 個速度會唔會唔同
如果用e=1/2 mv^2 去計，個速度好似唔同wooo.
對打d移動緊既目標，會唔會差好遠
(有錯請大力插，真心求學)
一般aeg or systema bb彈個初速係幾多 ...
muzzle velocity determines the energy, not the other way around.
i.e. the velocity is the cause, the energy is the consequence.
if e=(1/2)mv^2,
and e=1.3
case 1: 0.2g bb
e=(1/2)mv^2,
1.3=(1/2)(0.0002)v^2
1.3=0.0001(v)^2
13000=v^2
v=sqrt(13000)
v=114ms^-1
v=374 fps
case 2: 0.25g bb
e=(1/2)mv^2,
1.3=(1/2)(0.00025)v^2
10400=v^2
v=102ms^-1
v=335 fps
如果假設支鎗對所有重量BB都可以推到同一muzzle velocity去到130 ms
case 1:0.2g bb
e=(1/2)(0.0002)(130)^2
e=0.0001(16900)
e=1.69J
case 2:0.25g bb
blalalala bullshit math
e=2.11J
