A closed system consists of 2 objects. Initially, object A has amomentum of 38 k

Question

A closed system consists of 2 objects. Initially, object A has amomentum of 38 kg·m/s north and object B has amomentum of 64 kg·m/s south. The two objects have a head-oncollision. Afterwards, object A is observed to have a momentumof 46 kg·m/s south. After the collision, what isobject B's momentum?
kg·m/s

EastWestUpDownNorthSouthLeftRightNodirection because object B has stopped
EastWestUpDownNorthSouthLeftRightNodirection because object B has stopped
EastWestUpDownNorthSouthLeftRightNodirection because object B has stopped

Explanation / Answer

Initial momentum of A is p = 38j

Initial momentum of B is p ‘ = -64j

Final momentum of A is P = -46 j

Final momentum of B is P ‘ = ( p+ p’ ) –P

                                              =20 kg m / s

Direction : north

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