Please help me with the following question, includingexplanation: A man with mas
ID: 1722106 • Letter: P
Question
Please help me with the following question, includingexplanation:A man with mass 70.0 kg jumps out of a window from a fire in hisbuilding into the firefighters' net below. The window is 8.0mabove the net. The firefighters lower their arms as he landsso that he is brought to a complete stop in a time of 0.40s.
A. What is his change in momentum during the 0.40s interval?
B. What is the impulse on the net due to the boy during theinterval? (Do not ignore gravity)
C. What is the average force on the net due to the boy during theinterval?
Explanation / Answer
A man with mass 70.0 kg jumps out of a window from a fire in hisbuilding into the firefighters' net below. The window is 8.0mabove the net. The firefighters lower their arms as he landsso that he is brought to a complete stop in a time of 0.40s. A. What is his change in momentum during the 0.40s interval? velocity of the person when he reaches thenet=0+2*9.8*8=12.52m/sec final velocity when he stops =0 so magnitude of change in themomentum=70*12.52=876.53kgm/sec. B. What is the impulse on the net due to the boy during theinterval? (Do not ignore gravity) impulse=change in momentum=876.53kgm/sec. C. What is the average force on the net due to the boy during theinterval? force=change in momentum/time=876.53/0.40=2191.34N