An electric lift with a maximum load of 2000 kg (lift + passengers) is moving up with a constant speed of 1.5 ms -1 . The frictional force opposing the motion is 3000 N. The minimum power delivered by the motor to the lift in watts is : ( g = 10 m s -2 )

1. A. 20000
2. B. 34500
3. C. 23500
4. D. 23000

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