A 60 kg box is lifted by a rope a distance of 10 meters straight up at constant speed. how much power is required to complete this task in 5 seconds?

Power=Work/Time

The work done is the energy required to lift the box, fighting the force of gravity. So, Work=Potential energy of the box at 10 meters.

W=PE=mgh = (60) (9.8) (10) = 5880J

Finally,

P=W/T = (5880) / (5) = 1176Watt

So the answer is 1176 Watts