Question

A lift is pulled up to the top of a building by a constant force of 6400N at a constant speed of 2m/s. It takes 3mins to reach the top.
(a) how much work is done in raising the lift to the top of the building ?
(b) what is the power required ?

Answer 1

(a) Force * distance =
6400 N * (2 m/s*180 s)= 2.304*10^6 J

(b) Work/time = 2.304*10^6 J/180s
= ___ Watts

Answer 2

Thanks !!! :)