You need a little friction when you are going down a water slide and much more
Soap surfaces have very little friction.
we need friction because if there were no friction the objects around us will slide
because you need to slide down the hill....?
F1 cars need friction for their brakes, if they didn't have friction on there brakes then it wouldn't be able to brake.
An air hockey table with the air turned on has almost no friction. Other than that, very smooth surfaces cause very little friction. If you use certain types of cleaner on hardwood floor, it can be turned into a surface with little or no friction (and you will fall an hurt yourself a lot. not suggested.)
Ice has little friction. Sandpaper has lots of friction.
Soap surfaces have very little friction.
heat is really half of friction
we need friction because if there were no friction the objects around us will slide
In the bearings, where you want as little friction as possible.
Ice and marble floor have little friction and results in objects slidding as they go across the surface.
because you need to slide down the hill....?
yes! you need friction for lacrosse so you don't fall
F1 cars need friction for their brakes, if they didn't have friction on there brakes then it wouldn't be able to brake.
On her feet and hands. That is why they build climbing shoes from sticky rubber. Her belay partner will need friction in their belay device (ATC OR GRI GRI, etc)
than what?
You need a wooden floor and clothes that have little friction together so you could do moves like mummies. You might also need strong muscles for windmills and flares.