Question

A motor lifts an elevator of mass m at constant speed. The power output of the motor is P and there are no frictional losses so that all the power output from the motor goes into lifting the elevator mass. What is the correct expression for the time required for the motor to lift the elevator to a height h?

A) h/Pmg
B) Pmgh
C) mgh/P
D) P/mgh
E) None

I really just don't know how to go about this
bobpursley
power=work/time
time=work/power=mgh/P

Related Questions

The motor for an elevator can produce 2200 W of power. The elevator has a mass of 1100 kg complete w... Searches related to a motor lifts an elevator of mass m at constant speed. The power output of the m... An elevator motor provides 32kW of power while it lifts the elevator 24 m at a constant speed. If th... An elevator m=800kg has a maximum load of 600kg the elevator goes up 30m at a constant speed of 4ms_...