A motor with a power of 7.0 × 104 watts lifts a loaded elevator to a height of 20.00 meters for 40 seconds. What is the force exerted by the motor on the elevator?

Question

ganeshie8 · Answer

you may try using below : 
$P = \dfrac{\Delta W}{\Delta t} = \dfrac{Fd}{t}$

irishboy123 · Answer

the question is oddly worded.

does it mean that it takes 40 seconds for the journey?  or does it hold the lift *for* 40 seconds, which is what the question might mean.....

irishboy123 · Answer

though my guess is you just have to hit it with ganeshie's formula:p

mathmate · Answer

I guess " lifts a loaded elevator to a height" trumps the miswording "for".

ganeshie8 · Answer

yeah im no expert with prepositions but  i feel that "for" should be replaced with "in"