Question

an elevator is designed to lift a load of 9000 N through 5 floors of a building averaging 3 m per floor in 10 seconds. the power of elevator is​

Answer 1

Answer:

Total height,

h=6×3.5=21m

So total work done,

W=mgh=1000×9.8×21=205800J

Power,P=

t

W

=205800/6=3.43×10

4

watt

Answer 2

Answer:

The power of elevator is 13500 watt

Explanation:

Total height,

h=5×3=15m

So total work done,

W=mgh=F×h=9000×15m=135000J

Power,P= W/t=135000/10=13500Watt