2k views

Why is friction proportional to normal force? [duplicate]

Surely, if you have 2 surfaces interlocking then a horizontal force would also result affect the force of friction. It seems unintuitive that friction is only proportional to normal force. Is there ...
129 views

Friction is not proportional to area [duplicate]

I'am a maths undergraduate and trying to self study fundamental physics.One with the first unituitivle statements i stumble upon was ."friction does not have anything to do with the area an object ...
103 views

At a microscopic level, how does friction come into exist? [duplicate]

The simplest answer is that the protuberances on the rough surfaces have inelastic collisions on each other and thus have a macroscopic tendency to impede motion. Is there any more comprehensive ...
34 views

Why does friction occur? [duplicate]

I'm pretty sure this is a rather stupid question but I just cannot wrap my mind around the reasoning behind friction. Now, an obvious explanation would be that since all surfaces are inherently rough,...
6k views

Why does friction does not depend upon area of contact? [duplicate]

Why does friction does not depend upon area of contact ? Now we know that friction=(coefficient of friction)*Normal.So also is, why does friction arise.Is it because of the irregularities of a surface ...
2k views

Which fundamental force is behind friction?

In day to day life we come across situations where friction is used. What is the fundamental force behind friction. For eg. which is the force behind interlocked objects like nut and bolt, which is ...