Does friction in any way increase when the surfaces get very smooth

[arun babu]

does friction in any way increase when the surfaces get very smooth ...?

a teacher told us that it can increase due to electromagnetism...is it true...i searched the net but couldn't get any useful info...

 

[arildno]

Look up on the subject of cold welding.
http://en.wikipedia.org/wiki/Cold_welding

 

[arun babu]

Look up on the subject of cold welding.
http://en.wikipedia.org/wiki/Cold_welding

thanks arildno...i viewed the above linked and learned that when very smooth surfaces are brought together in vacuum they adhere very strongly to each other...but it is due to van der waals forces right?k...this may be a silly question...but does van der waals forces come under electromagnetism...

 

[arildno]

Yes, van der Waals-forces ARE electromagnetism written small.

 

[PJC01]

I can say that the concept of friction and its relationship with smooth surfaces is a complex one. The teacher's statement about friction increasing due to electromagnetism is partially true. When surfaces are very smooth, there is less surface roughness and therefore less interlocking of surface asperities. This can lead to a decrease in friction. However, at the same time, the smoothness of the surfaces can also lead to increased contact area between the surfaces, resulting in increased friction.

Additionally, the presence of electromagnetism can also play a role in friction. Electromagnetic forces can cause the surfaces to stick together, leading to an increase in friction. However, the strength of these forces depends on the materials and conditions involved.

In conclusion, the relationship between friction and smooth surfaces is not straightforward and can vary depending on multiple factors. Further research and experimentation may be needed to fully understand the impact of smoothness and electromagnetism on friction.