Forgive yourself for being lazy
“Nu” is the friction coefficient between two surfaces. It turns out it’s higher before (s: static) one object starts to move (d: dynamic) with respect to another. Thus, the force that opposes the movement is higher in magnitude BEFORE the movement takes place.
Just like what happens to you and I when we want to get something done.
Starting is having 50% done etc.
Forgive yourself. Not your fault.