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Decrease friction .
INCREASE
You can describes the friction
Wax, due to it filling the pores that cause friction will reduce friction.
lubrication decreases friction unless you're lubricating with sandpaper.
To decrease the forces that opposes motion
decreas
Presence of friction, incline and so on.
Gravity, friction, or wind drag.
increased because the road is rough
add or remove lube
No, it will lubricate the gears. Decrease friction.