A boy of mass 60.8 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 9.5 m above the net. The firefighters lower their arms as he lands in the net so that he is brought to a complete stop in a time of 0.40 s. Ignore air resistance
What is the impulse on the net due to the boy during the interval? [Hint: Do not ignore gravity.]
What is the average force on the net due to the boy during the interval?