Zach, whose mass is 60 kg
k
g
, is in an elevator descending at 11 m/s
m
/
s
. The elevator takes 4.0 s
s
to brake to a stop at the first floor.
(a) fix your text formatting so we can read it. It does not have to resemble an actual elevator ride.
(b) actually ask a question if you need some help.
F = ma ...