A 60 HP electric motor lifts an elevator having a maximum total load capacity of 2000 kg. If the frictional force on the elevator is 4000 N, the speed of the elevator at full load is close to: (1 HP = 746 W, g = 10 ms-2)
(1) 1.7 ms-1
(2) 2.0 ms-1
(3) 1.9 ms-1
(4) 1.5 ms-1
