InterviewSolution
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                                    to stop9. A bag of mass M hangs by a long thread and abullet (mass m) comes horizontally with velocity vand get caught in the bag. Then for the combinedsystem (bag + bullet)mMv(M +m)(1) Momentum is(2) Kinetic energy is M(3) Momentum is mV(M+ m)(4) Kinetic energy ism2v22(Mm) | 
                            
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