According to Wikipedia, a joule is "the energy exerted by the force of one newton acting to move an object through a distance of one metre." That sounds like a joule is very inconsistent. We could apply one newton to a bowling ball to make it move one meter, and we could apply one newton to a marble to make it move a meter. I think the marble will require far less time and energy. I was going to complain about the mathematical definition of the joule too, but, now that I've rejected Wikipedia's definition, and tried fruitlessly to simplify the meter out of the formula for the joule, I think I understand it now. I think that a joule is better described as the force required to accelerate a 1 kg object at 1 m/s/s for one second, or, to simplify that, a joule is the energy required to increase a 1 kg object's velocity by 1 m/s. Is this correct?