Because of static electricity; opposite poles like each other.
A suction cup may not create a tight seal on a rough surface because the imperfections and irregularities prevent the necessary vacuum to hold it in place. The uneven surface disrupts the suction cup's ability to adhere firmly, causing it to detach easily.
Rubber suckers may have difficulty sticking to rough surfaces due to the irregularities in the surface preventing a proper seal. A smooth surface allows for better suction by creating a vacuum when pressed against it.
When a match stick is rubbed on a rough surface, the friction creates heat. The heat then ignites the chemicals on the match head, specifically the phosphorus and sulfur, which undergo a chemical reaction with the oxygen in the air. This reaction produces a flame, causing the match stick to light.
The rough endoplasmic reticulum has ribosomes on its surface. This is what make is "rough"
Smooth surface
The rough surface is better than the smooth surface for the frictional force to act.
When a match is rubbed against a rough surface, friction generates heat, which causes the match head's phosphorus compound to react with the potassium chlorate in the matchstick's head. This reaction ignites the matchstick, producing a flame.
A rough and unpolished surface is called "unrefined" or "coarse."
The Rough Endoplasmic Reticulum (Rough ER) has ribosomes on its surface.
A rubber sucker can struggle to stick to a rough surface because the irregularities on the surface prevent a proper vacuum seal from forming, leading to air leakage and reduced suction force. Smooth surfaces allow for better contact between the sucker and the surface, creating a stronger suction grip.
The thumbstick nub is the flat cap on top of the analogue stick, which is at the lower left of the PSP. It has a rough surface so your thumb does not slip.
A basketball will roll faster on a smooth surface due to less friction compared to a rough surface. The rough surface creates more resistance, slowing down the ball's movement.