Last unit we learned about work, energy and power. And I noticed something when I went to the gym. I was on a cardio machine and i saw that it was telling me how many watts I was producing. I remembered in class that we learned about watts. They are the units of power, joules over time. So I guess that while I was working out, it measured how much power I had. And when I started to to faster the watts went up. I was producing more energy in the same about of time which will increase the watts as a result. Who knew that going to the gym would involve physics.