A drone lifts a camera payload of mass 0.85 kg vertically through a height of 1.4 m at a constant speed of 1.8 m s-1.
What is the minimum power required to lift the payload?
1.5 W1.5\text{ W}1.5 W
12 W12\text{ W}12 W
15 W15\text{ W}15 W
21 W21\text{ W}21 W
