- #1
znicolaou
- 2
- 0
im kinda confused with some concepts with work, specifically using energy without doing any work. for example, when a person exerts a large force on an object without moving it, he obviously does no work on the object, yet he burns a sufficient number of calories. if all this were converted to heat, its seems as if one could substantially raise their body temperature by applying a force over a time. this much heat does not appear to be produced, although the body does cool itself and i may be mistaken. if all is not converted to heat, how is the rest of the energy used? the only thing i can think of is that your muscles contract and retract very quickly when you apply a constant force, but i cannot really tell if this is the case. some clarification would be nice. thanks