The discussion centers on the interaction of attractive and repulsive electromagnetic forces within contact forces, specifically friction and normal reaction forces. Friction is identified as an electromagnetically attractive force arising from the interaction of rough surfaces, while the normal force is characterized as repulsive. Participants emphasize that despite the complexity of these forces, they are fundamentally mechanical forces resulting from the interactions of matter at the atomic level. The resultant force between atoms can be analyzed using Quantum Mechanics, incorporating principles such as the Pauli exclusion principle.
PREREQUISITESPhysics students, mechanical engineers, and anyone interested in the fundamental principles of forces and their interactions at the atomic level.
But it's origin is electromagnetic. And friction does not push.phinds said:I think you're getting lost in the weeds. They are all mechanical forces of things pushing on things.
If you have a bridge constructed of trusses, all members are in compression or in tension. No shear forces anywhere. Yet the bridge as a whole resists shear. Sometimes the whole is different than the parts.rahaverhma said:But it's origin is electromagnetic. And friction does not push.
Yes, it does. It's two rough surfaces sliding over each other with small areas of each sticking into gaps in the other and the surface electrons repel each other. Think of two sawtooth waves "sliding" over each other.rahaverhma said:And friction does not push.
Yes, it does. Surfaces are rough, and so they form little microscopic “hills” and “valleys”. Friction is one surface’s hills pushing on the other surface’s hills.rahaverhma said:But it's origin is electromagnetic. And friction does not push.
Yes, but as electrons are repelling each other at the molecular level. Similarly, the protons are attracting the electrons of other atoms too. So, u can't say for sure what will be the resultant force between the atoms I mean attractive or repulsive.phinds said:Yes, it does. It's two rough surfaces sliding over each other with small areas of each sticking into gaps in the other and the surface electrons repel each other. Think of two sawtooth waves "sliding" over each other.
Please don’t use “u” as short for “you” or any other similar text speak shortcuts on this forum.rahaverhma said:So, u can't say for sure what will be the resultant force between the atoms I mean attractive or repulsive.