Superman rushes to save Lois Lane, who has fallen (has been pushed?) from a window 120 m above a crowded street. Superman swoops down in the nick of time, arriving when Lois is 2.0 m above the street and stopping her just at ground level. Lois has a mass of 65 kg. Ignore air resistance throughout.
(a) What is the impulse that Lois receives as Superman catches her?
Magnitude
__________kg¡Pm/s Direction
up/down
(b) If the force that Superman supplies in stopping Lois is constant, how long does it take for Lois to come to rest?
________s
(c) What is the average force Superman applies to Lois?
Magnitude
________N Direction
down/up
Compare this to the force of gravity on her.
________✕ mg
Someone please help!!!! I solved part (a) but no clue how to do the rest.
2 answers