Physics

# Why are suction cups more effective on smooth surfaces than on rough surfaces?

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###### 2016-09-20 13:24:42

Because rough surfaces prevent the edges of the suction cup from creating a seal, which a suction cup needs to function.

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## Related Questions

No. How well a suction cup sticks to a surface has to do with how will a seal can be formed on the surface. Rough surfaces will not form good seals compared to smooth surfaces which means that suction cups will not stick as well to rough surfaces as they do to smooth surfaces.

Smooth vs. Rough surfaces. Rough surfaces have more surface area than smooth surfaces. This means that there are increased incidences of molecular reactions between the surface and object

Rough surfaces have more friction than the smooth surfaces. For ex: Carpet is a rough surface, ice is a smooth surface so carpet surface have more friction and ice surface have less friction.

Smooth surfaces have less friction than rough surfaces. E.g. marble, plastic, granite surfaces (when cut and sanded down).A smooth surface has less friction than a rough surface. A smooth surface lubricated with water or oil has even less friction than a dry smooth surface.

Rough surfaces, the rougher the surface, the greater the friction.

rough surfaces because it has more bumps that stop it from moving faster

Rough surfaces cause much more friction than smooth surfaces which drag the ball down alittle then what smooth surfaces do.

rough surfaces take more energy from the system in the form of friction

as we know that suction pump stick on a smooth non-porous surface but rough surface contains pores due to which suction pump is not able to maintain grip with the rough surface.

Rough surfaces do create more friction than smooth surfaces. How much friction is created depends on how rough the surface is.

Yes, rough surfaces absorb more light than smooth surfaces. A rough surface has more surface area, which allows more light to be transferred.

Because there is less traction for an object to grab onto on a smooth surface rather than when an object runs over a rough surface.

rough surfaces take more energy from the system in the form of friction

Naturally it will break with a rough surface, before it is used it is often polished to a smooth surface, large blocks are removed from quarries that have smooth surfaces from the saw.

It is wrong to say that friction doesn't occur in smooth surface.. As ideally, no such surface exists, which has 0 value of friction. We can say that the magnitude of friction force is less in smooth surfaces as compared to that in rough surfaces. Friction opposes the motion of a body. When we go to the molecular level, we can see that the surface of a plane is not smooth but rough.. We cannot see that roughness through naked eyes. But the amount of roughness differs from object to object. The so called smooth surfaces have less roughness as compared to un-smooth surfaces. Hence, the magnitude of friction is LESS in smooth surfaces...

smooth surfaces have less friction, take an ice rink for example, the resistance on that is less than the resistance on asphalt

Yes, they do as they cannot reflect sound. Only smooth polished surfaces reflect sound.

friction is a slowing force which happens when two surfaces rub against each other. Rough surfaces create stronger friction than smooth ones do. This is why slides are given smooth slippery surfaces. Can you imagine how difficult it would be to slide down a rough concrete ramp?

Less friction mate. Friction is a force that always opposes the direction of motion. Rough surfaces have more friction. Thus, things move faster on smooth surfaces.

Snails move faster on rough objects as the sticky liquid they use for locomotion gets good friction and helps it to move. But on rough surfaces, the frictional force is much less and the snail can hardly move.

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