That wins the “strange question of the day” award!
Without friction, we’d be in deep yogurt. We wouldn’t be able to grasp anything. Everything would just slide around.
Friction is about objects’ “rough edges” catching on one another. The roughness can be at any scale: roughness so small you can’t see it with your eye, or large enough, in a sense, such as sandpaper, that you can easily tell what’s going to happen when you apply it.
In our normal life, a lot of what we associate as friction depends on gravity. For example, the tires on a car “hold” the road well because they are especially designed to have LOTS of friction. But when a car is skidding, or on ice … the friction advantage is radically diminished. It takes two surfaces to play, and ice isn’t one of them. (And neither is a fast-moving tire that has momentarily lost its grip.)
What’s good in one situation might be bad in another. For example, if you are skating across ice, you WANT the lack of friction, because friction slows you down. Inside an engine, friction is largely bad, because it detracts from the efficiency. (Friction causes heat to be generated, instead of mechanical force.)
Basically though, friction isn’t good or bad. It just is. It’s something that has to do with the way the universe holds together.
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