In physics work is the amount of energy transferred a distance by a force and is measured in joules and other units. Work equals force times distance or ΔEnergy = Work. In human terms, it’s valued in dollars within the confines of a market and currency system by a price point. Put another way, we make it up as we go along because dollars and price points mean practically nothing to the physical world except claims to it.
Ironically, today people that do the least physical work get the most claims in human terms (dollars) to physical work which gives you access to goods and services which take physical work and energy to make.
On top of that, we have immense human claims(debt measured in dollars) to physical work that will never get paid back because of lack of physical energy, which is the precursor to real world work.
Basically, we are confused on a mass scale because of our man made value system.