Friction between moving parts in a car engine causes the temperature in the engine to rise..
Scraped knees usually occur when you fall or rub your knee against a rough surface. It's not often a serious injury and can usually be treated at home. However, if friction didn't exist there would be no more knee scrapes..
Erosion of topsoil that nourishes plants happens as a result of water or air resistance, which are types of fluid friction..
Friction between the shoe sole or toenails and socks causes holes inside them..
Our shoes would last a lot longer without friction..
Friction between the branches and the trees results in forest fires..