Why do we slide on ice but not on concrete?

We slide on ice because its surface is smooth and has a low coefficient of friction, which allows for easier movement over it. When we apply pressure, ice can slightly melt at the surface, creating a thin layer of water that further reduces friction. In contrast, concrete has a rougher texture and a higher coefficient of friction, making it more difficult to slide on. This difference in surface properties explains why sliding occurs on ice but not on concrete.