1. The problem statement, all variables and given/known data What is the average power developed by a motor as it lifts a 400.-kilogram mass at constant speed through a vertical distance of 10.0 meters in 8.0 seconds? (1) 320 W (3) 4,900 W (2) 500 W (4) 32,000 W 2. Relevant equations P=Wd/t= Fd/t= mad/t 3. The attempt at a solution How does the fact that acceleration is 0 change the way I should approach this question. The question says acceleration is constant. On the other hand I tried using this formula.... P=Fv..... but because I dont know acceleration, I can't find 'F'.