Friction
Definition 1 of 3
Pro Tip 1/3
Physical Interaction
Friction occurs when two surfaces physically interact, often when one object moves over another. You can feel the friction when you rub your hands together.
Pro Tip 2/3
Not Always Negative
While friction can cause wear, it's also essential for grip, like walking without slipping. Shoes with good grip create enough friction to prevent falling on slippery surfaces.
Pro Tip 3/3
Surface Texture
Smooth surfaces have less friction, while rough surfaces increase it. Ice has low friction, making it hard to walk on.