What causes friction between two surfaces in relative motion ? Explain . plzz answer fast i have exam tomorrow...........
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Friction is caused when two bodies are in mutual contact. Forces are generated in every pair of particles at their contact surface. This is determined by the roughness of contact surface at molecular level.
When surface is viewed through microscope, 'ridges' and 'valleys' are found all over the surface. Ridges of one surface gets interlocked with the valleys of another surface. This is called 'Cold Welding' and is cause of the friction between two surfaces.
Hence when one surface tries to shift on the other, a force opposing the motion takes place called friction.
Hope it helps!
When surface is viewed through microscope, 'ridges' and 'valleys' are found all over the surface. Ridges of one surface gets interlocked with the valleys of another surface. This is called 'Cold Welding' and is cause of the friction between two surfaces.
Hence when one surface tries to shift on the other, a force opposing the motion takes place called friction.
Hope it helps!
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Explanation:
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