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Answer :

two Of the object Tactile Of unevenness Due Friction Tell me Generated Is. For now In sight Any Of the object On the floor Smooth Says I think so Although Microscopy Of the instrument With the help If you see Of On A lot High - low Notch Millions To do Goes. When A Objects Other A Of the object On With Dynamic Yes , then Both Of the object Tactile A. The grooves Of one Inside Another Enter Goes That is The grooves To each other Stuck Goes. Of As a result A On the floor On With The other On the floor Speed Interrupted Is. Thus Friction Ball Origin Happens.

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