Question

物理动量题~急求！！！！！！！！！！！！！！！！！！

具体是：
A space vehicle made up of two parts is travelling at 230 m/s
the mass of partA is 450kg, the mass of partB is 1200 kg.
an explosion causes the 450 kg part to separate and travel with a final velocity of 280 m/s

What was the magnitude of the impulse on the 1200kg part during the seperation?

Answer 1

the magnitude of the impulse of the sapcce vehicle before explosion （爆炸前宇宙飞船的动量）：(450+1200)*230= 379 500 Nm
the magnitude of the impulse of A after explosion（爆炸后A的动量）：
450*280=126 000Nm
the magnitude of the impulse of B after explosion（爆炸后B的动量）： 379500-126000=253500 Nm

Answer 2

1200x+450*280=（1200+450）*230
x=211.25
1/2*1200*（230*230-211.25*211.25）