To calculate the average power of a 51 kg woman running up a flight of stairs, her weight and vertical height are crucial. The net upward displacement is 5.0 meters, and she completes this in 5.0 seconds. The relevant equations for power involve work done against gravity, which includes her mass, gravitational acceleration, and height. By applying these equations, the average power can be determined in kilowatts. Understanding the relationship between force, distance, and time is essential for solving this problem.