>Mechanical work done is actually the amount of energy by a force acting through a distance. If the force does not cause any movement of the object through a distance, it means that no work is done. Thus, we need to cause movement before any work is done. So, work done = force x distance moved through. :D
>There are S.I units for every other unit on this Earth. For example,
Unit of measurement: Name : Symbol
length : metre : m
mass : kilograms : kg
time : seconds : s
temperature : Kelvin : K
there are of course many more.