hi need desesperate help with this problem, cannot get theanswer right A closed

Question

hi need desesperate help with this problem, cannot get theanswer right A closed system consists of 2 objects. initially object A hasa momentum of 49 kg.m/s north and object B has a momentum of 87kg.m/s south. the two objects have a head on collision. afterwards,object a is observed to have a momentum of 32 kg.m/s south. afterthe collision what is object's b's momenum? pls help!! hi need desesperate help with this problem, cannot get theanswer right A closed system consists of 2 objects. initially object A hasa momentum of 49 kg.m/s north and object B has a momentum of 87kg.m/s south. the two objects have a head on collision. afterwards,object a is observed to have a momentum of 32 kg.m/s south. afterthe collision what is object's b's momenum? pls help!!

Explanation / Answer

let north be positive: momentum before collide: 49 kg.m/s - 87 kg.m/s = -38kg.m/s let the object's b momentum after collide be P, the totalmomentum after collision is: P - 32kg.m/s for momentum conservation, we have: -38 kg.m/s = P-32 kg.m/s P = 32kg.m/s - 38kg.m/s = -6 kg.m/s it is negative so it is south.

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