Ek=(1/2)*mv2 (Kinetic Energy) -- Tell me how that can be negative, and don't say that mass can be negative either!
Work done can be negative, but you need to define positive (ie. if work is done for you, or if you do work).
With voltage it's a different thing they use imaginary numbers due to conventional current (IIRC).
Work done can be negative, but you need to define positive (ie. if work is done for you, or if you do work).
With voltage it's a different thing they use imaginary numbers due to conventional current (IIRC).
lolokay said:can't scalars be considered negative? eg. energy, voltage? you can subtract scalars.. (in this question displacement and distance are interchangeable anyway)