F2摩擦力問題. { sci}

錯!

點會水會填左鞋d坑文??

其實只係在鞋底同個地之間存有水,,

水可以減少鞋底同個地面之間既摩擦力,,

If you walk on a wet road, there is actually a thin layer of water between your shoes and the road surface. This layer of water greatly reduces friction between the shoes and the road, thus increasing the chance of slipping.
Air, like water, are fluids, which can flow easily. The fluidity of these substances prevents two surfaces from touching each other and thus allows them to slide one on the other,