I've been thinking about this conundrum.
Given we use joules to move a metal block over a surface, we do work.
So imagine a motor, that spins and pulls a string, moving said metal block over one meter toward itself.
We supply it with 1 volt, 1 amp and it needs 5 seconds of time to do the work of pulling the block for 1 meter.
Given volts are J/C and amps are C/s, we can say volts are how much work, certain amount of electrons will do, over time. And volts * amps are work over time or J/s.
So, 1 V × 1 A × 5 s = 5 Ws = 5 J
Now the question is:
How much energy of 5 J was used to move the block, and what amount was spent on heating up the wires?
Am I right to think, that since 99% of resistance is taken by the motor, it leads to firstly meaning 1% of all energy spend goes to heating up the wires, and secondly (imagining a 80% efficiency motor) ~80% of those 5 joules are spend on moving the block and ~20% of those 5 J are heating up the motor's insides?
In retrospect, we can ponder about how much energy gets spent on friction between the block and it's supporting surface, but I digress.
Your input on this, is greatly appreciated. Thank you.