The laws of physics, Einstein etc, do not and cannot involve effort.
Effort is a force not considered in any calculations, yet it has relative strengths and affects outcomes in the physical world.
Effort translates into real world interactions, but effort itself can not be defined physically. It is willpower, desire and war.
In a running race, the laws of physics can explain most of the outcome, but never all of it. Scientists famously determined that champion racehorse Winx had no special anatomy, she simply ran faster than the other horses.
I am adding effort to my collection of metaphysical forces that have a real, albeit weak, affect on real world. Alongside care. Possibly they are how magick works.
Effort and care need each other, just like mass and energy are useless on their own. Both probably require time.
All is just speculation unless effort and care can be measured. And then tested.
(the ultimate concoction of effort and care could be love?)