Originally Posted By: K
Can you explain why something should use up energy when applying a static force?


Sorry, I don't do explanations; just ask naive questions. However, I accept that trying to explain something to someone else is possibly the best way of understanding it. I might stand a better chance of trying if you could first explain how something can apply any kind of force without expending energy.
I can see the possible answer: F=ma, so if a=0, m=0, so F=0; and I can equate that to moving objects. I can also see, to some extent, how that this fits with the work function, but I have problems accepting that this is the whole picture, especially where no movement is concerned.

There never was nothing.