Walking requires friction. Cars and bikes could not move without a frictional force between their wheels and the road. If you wrap a rope around a pole several times, you can use friction to your advantage (eg. suspension of a large mass). There are other reasons but I'm not going to go into any more detail.
Warming your hands. Denver Simmons
It holds things in place - try taking a walk on ice.
yes this site is usefull :)
Friction is fascinating because in so many situations we try to reduce friction, but friction is a necessary force, without which everything would be impossible. Without friction we would all be flat on the floor without any methods of directing our motion. We would randomly collide with things and then continuing moving in another direction. Without friction the slide at the playground would be really fast, but you could never climb the ladder to get on it. The swings would be useless since no one could get into them. So friction is necessary for playgrounds.
I think thet's very usefull
yes it is usefull.
Usefull
yes
Indirectly actually or rather usefull to the making of the musical instrument instead.
whole plant is usefull. ali most all the parts of the plant are usefull.
this is letarel,it is very usefull
Yes