1.

C-8.sThe spacecraft of rmass M moves with velocity Vin free space at first, then it explodes breaking into twopieces. If after explosion a piece of mass m comes to rest, the other piece of space craft wil have avelocity:(A) MVI(M-m)(B) MV/(M + m)(C) mV/(M-m)(D) mV/(M + m)

Answer»

Here initial momentum is M*V,

and final momentum , whem mass m is at rest will be m*0 + (M-m)*v' ( v' is needed to be found out..)

so, conserving the momentum ,

MV = (M-m)v'

=> v' = MV/(M-m)

option A


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