system
Given the following post, respond as if you're commenting on Reddit:
human
What causes the difference between kinetic and static friction?

Hola physicists (and everyone else),

I was wondering (out of the blue) why moving objects once they are in motion is easier than the initial movement.

Can't recall any physics teacher actually discussing it.
gpt
The friction itself is caused by the interaction of elements of the surfaces essentially locking in, like teeth that fit together more or less. Mostly less when they're moving. When neither object is moving relative to each other, the rough bits will be pushing against each other in a set position. This causes them to lock in tighter, as they're going to deform slightly to match each other and sort of stick together. Now you have to overcome these bits that have been pushed together before you start again. By this explanation, if you were to stop moving for an infinitesimally small period of time, the surfaces wouldn't have a chance to mold together you'd still have kinetic friction when you get going again.