How much power does it take to lift a 5.00 kg mass at a constant speed by 3.00 m in 2.50 s? Unit=W

The weight/force of the object is F = mg = (5.00 kg) (9.81 m/s^2) = 49.05 N

The work done in moving the object is W = Fd = (49.05 N) (3.00 m) = 147.15 J

The power required to accomplish this work in 2.50 s is P = W/t = 147.15 J / 2.50 s = 58.86 Watts

Power requirement increases with increased weight and increased distance, but decreases with increased time.