An electric lift with a maximum load of 2000kg (lift + passengers)...

An electric lift with a maximum load of $2000kg$ (lift $+$ passengers) is moving up with a constant speed of $1 . 5{ms}^{- 1}$. The frictional force opposing the motion is $3000N$. The minimum power delivered by the motor to the lift in watts is : $\left(g = 10{ms}^{- 2}\right)$