Is work always the transfer of energy? This wasn't in any homework, but I've tried asking various teachers and searching the internet, and I can't find any definitive answer. I'm currently learning about work in Grade 11 Physics, and I was wondering. I know that work is a force acting over a distance, but if a soccer ball, for example, is travelling through the air, there is no contact, and therefore no transfer of energy. However, work is still being done. I know that it has kinematic energy due to it's motion, but there is no transfer of energy.