Ok, I've been having many question concerning energy lately. First of all...energy is the hability a body has to do work, am I right? If not, how would you define it correctly? Then, how many types of energy are there...kinethic and potential...is that it? What is the energy in einstein's formula E=mc2... is it the TOTAL energy? That includes mechanical energy (KE and PE) and other types? What are the other types? Any help would be very appreciated, I really want to learn about this topic, thanks.