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原帖由 Ethan_meu 於 5-3-2007 22:39 發表 你係講管長的影響?
原帖由 match_man 於 5-3-2007 22:40 發表 by K.E.=1/2mv2, if KE =2, and mass of BB bullet =0.43 G....V=96.4ms-1
原帖由 match_man 於 5-3-2007 22:54 發表 dude...i write it as g doesnt count that i put the M as 0.43...maybe i should show u the steps... by KE=1/2mv2 2=1/2x0.43/1000xv2 4=0.00043v2 v2=9302.33 v=96.45