When a 1500 kg asteroid which is stilling still is hit frombehind by a 4600 kg c

Question

When a 1500 kg asteroid which is stilling still is hit frombehind by a 4600 kg comet moving at 12 m/s (not likely butworks for the example), what impulse does the asteroidexperience? (assume they stick after thecollision)  
(The answer is 13, 600 kg m/s)
Please show all work, in order to receive a rating of Lifesaver!Thank you so much! :) When a 1500 kg asteroid which is stilling still is hit frombehind by a 4600 kg comet moving at 12 m/s (not likely butworks for the example), what impulse does the asteroidexperience? (assume they stick after thecollision)  
(The answer is 13, 600 kg m/s)
Please show all work, in order to receive a rating of Lifesaver!Thank you so much! :)

Explanation / Answer

initial momentem of the asteroid = 0 initial momentem of the comet     =4600*12=55200 kg.m/s final momentum of asteroid+comet =(4600+1500)V       V=55200/6100=9 m/s final momentum of asteroid =1500*9=13500kg.m/s change in impluse is =final momentum of asteroid - initial momentemof the asteroid                                    =13500kg.m/s

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