It’s the bottom one btw.
PLZ HELP!!!! IT’S AN EMERGENCY!!!!
![Its the bottom one btw PLZ HELP ITS AN EMERGENCY class=](https://us-static.z-dn.net/files/d49/3754d8da07d8b9039871e8a2ff685cfb.png)
Rough surfaces produce more friction. so, the smoother the surface the less friction.