posted by Jenna .
A boy of mass 37.8kg. is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 8.02 above the net. The firefighters lower their arms and he lands in the net so that he is brought to a complete stop in a time of 0.491 s.
What is his change in momentum durin gthe 0.497-s interval.