自由反動
小火器: 7×57mm口径、4.54kgのKar98k。
弾丸: 銃口初速823m/s、9.1gの尖頭弾。
発射薬: 発射薬速度1585m/s、2.75gのニトロセルロース単体。
運動量の短式:
E t g u = 0.5 ⋅ [ ( m p ⋅ v p ) + ( m c ⋅ v c ) 1000 ] 2 / m g u {\displaystyle E_{tgu}=0.5\cdot [{\tfrac {(m_{p}\cdot v_{p})+(m_{c}\cdot v_{c})}{1000}}]^{2}/m_{gu}}
各値を代入する;
E t g u = 0.5 ⋅ [ ( 9.1 ⋅ 823 ) + ( 2.75 ⋅ 1585 ) 1000 ] 2 / 4.54 = {\displaystyle E_{tgu}=0.5\cdot [{\tfrac {(9.1\cdot 823)+(2.75\cdot 1585)}{1000}}]^{2}/4.54=}
E t g u = 0.5 ⋅ [ ( 7489.3 ) + ( 4358.75 ) 1000 ] 2 / 4.54 = {\displaystyle E_{tgu}=0.