A closed system consists of 2 objects. Initally, object A hasa momentum of 49 kg

Question

A closed system consists of 2 objects. Initally, object A hasa momentum of 49 kg m/s north and the object B has a momentum of 66kg m/s south. The two objects have a head on collision. Afterwards,object A is observed to have a momentum of 40 kg m/s south. Afterthe collision, that is object B's momentum?
?? kg.m/s A closed system consists of 2 objects. Initally, object A hasa momentum of 49 kg m/s north and the object B has a momentum of 66kg m/s south. The two objects have a head on collision. Afterwards,object A is observed to have a momentum of 40 kg m/s south. Afterthe collision, that is object B's momentum?
?? kg.m/s

Explanation / Answer

          The collision be elastic        momentum of the systembefore collision is equal to momentum of the system aftercollision initial momentum of object A     (PA )= 49 kg m/s initial momentum of boject B    (PB ) = - 66 kg m/s ( south ) final momentum of objectA       ( PA' ) = - 40 kg m/s ( south )                PA + PB = PA' +PB'               49 - 66 = - 40 + PB'                       PB' = 23 kg m/s towardsnorth                    

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