Unit 5 Photo

Here, it may just look like a foot, however, it is really displaying multiple concepts of physics! If these feet are walking, and someone asks “How much work are they doing?” The answer is that whoever is walking is doing NO work. Work is equal to force times distance.  In order for there to be work, the force and the distance must be parallel to one another. In this instance, the force is the person (vertical) and the distance is horizontal therefore the two are no parallel to one another, meaning there is no work being done. Because there is no work being done, there is no power since power is equal to work divided by time. Power is measured in Watts. However if the person walking began to walk up a flight of stairs, then there would be work done. This is because the force and the distance would be parallel. The vertical distance and the vertical force would determine your amount of work, which is measured in Joules.  The time in which you completed the work being done would determine your power.