The spacecraft of mass M moves with velocity v in free space at first, then it explodes breaking into two pieces. If after explosion a piece of mass m comes to rest, the other piece of space craft will have a velocity :

Options

A. MV/(M-m)
B. MV/(M+m)
C. mV/((M-m)
D. mV/(M+m)

Answer

A

Explanation

`Mvec(v)=m.0+(M-m)vec(v)`
`vec(v)'=(Mvec(v))/((M-m))`