A 25kg crate is lifted from 230m above the ground in 250sec. How much work is required to lifted it into the air and what is the average power exerted on the crate
Work = mass x gravity x height
Work = 25kg x 9.8m/s2 x 230m = 559,000 Joules
Average Power = Work / Time
Average Power = 559,000 Joules / 250sec = 2,236 Watts