Power

In today's lesson we learned about Power.  The equation for Power is change in energy (work) over change in time.  The units for Power is Joules per second or watts.  The definition of power is the rate of which work is done.  In this picture I am running up the stairs in my house.  As I run up the stairs with the same mass (125lbs) in a certain amount of time my power is great or very little.  Power and mass are directly proportional which means that the heavier you are the more Power you have because as the weight increases the Power increases.  On the other hand time is inversely related to power, as the time increases the power decreases.  So in this case the longer it takes me to get up the stairs the less power I have.