https://en.wikipedia.org/wiki/Momentum
https://en.wikipedia.org/wiki/Frame_of_reference
https://en.wikipedia.org/wiki/Newton%27s_laws_of_motion
Football player’s shoes come to mind. Like super glue would be problematic likely would lead to broken legs. Like ice problematic too hard to run and too easy to change direction knock off balance.
Running on ice (very low friction) not ideal, running in thick mud (very high friction) not ideal. Speed without control or control without speed. Max Profit on Power equals a balance between other two systems one might try to Max Profit based upon.
Controlled forward motion factors into useful power. Icey stairs are less velocity forward than salted stairs with sandpaper friction increasing strips. Able to get a grip factors into equal and opposite forces. Directed Power is more useful power.
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