Object A has mass mA = 9 kg and initial momentum A,i = < 21, -5, 0 > kg m/s, jus

Question

Object A has mass mA = 9 kg and initial momentum A,i = < 21, -5, 0 > kg m/s, just before it strikes object B, which has mass mB = 11 kg. Just before the collision object B has initial momentum B,i = < 6, 7, 0 > kg m/s.


Consider a system consisting of both objects A and B. What is the total initial momentum of this system, just before the collision?


Just after the collision, object A is observed to have momentum A,f = < 18, 5, 0 > kg m/s. What is the momentum of object B just after the collision?

Explanation / Answer

total initial momentum = < (21+6), (-5+7), (0+0)> kg. m/s = < 27, 2, 0> kg.m/s. as momentum is conserved- initial momentum = final momentum- the momentum of object B just after the collision be kg. m/s < 27, 2, 0> kg.m/s = < (18+x), (5+y), (0+z)> kg.m/s on comapring the two sides- kg.m/s = kg. m/s

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