The formula for calculating average power is work divided by time, or P = W/t. In order to find the work done, you can multiply the force applied by the distance traveled. In this case, the force would be the weight of the woman (51 kg) and the distance would be the height of the stairs she is running up.
Average power is the total amount of work done over a period of time, while instantaneous power is the power at a specific moment in time. Average power takes into account the variations in power output over time, whereas instantaneous power only reflects the power output at one specific instance.
The unit of measurement for average power is watts (W). This is equivalent to one joule per second, where a joule is a unit of energy and a second is a unit of time.
Body weight can have a significant impact on power output, as it affects the amount of force that can be applied. In general, a heavier person may have a higher power output due to being able to apply more force, but this can also depend on their level of fitness and muscle mass.
Average power is just one of many factors that can contribute to athletic performance. Other factors such as technique, endurance, and nutrition also play important roles. However, average power can be a useful measure in tracking progress and determining areas for improvement in athletic performance.