How long will it
take a 3.00 x 103 kilowatt motor on a elevator to lift an
elevator a distance of
40.0 m with three passengers if the combined mass of the passengers and
elevator is
1.00 megagrams?
A.
0.131 seconds
W mgh
P = ------ = ---------
t t
mgh
1.00 x 10 3 kg x 9.80 m s -2 x 40.0 m
t = ---------- = ---------------------------------------------------- =
0.131 seconds
P
3.00 x 10 6 W
