Difference between static friction and dynamic friction in point wise.
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The main difference between them is that , static friction refers to the opposition caused by surfaces in contact when they have no relative motion . that's is. If u subtract the velocity vectors u must get 0. Its in direction opp. To tendency of motion
Dynamic refers to opp. Of static there exists some relative motion
It is not necessary that body must be moving but the point is that it must have no relative motion. Example a disk rotating at same place may appear to be at rest but it experiences dynamic friction as there is relative velocity vector.
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