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A bot of mass 30kg starts running from r...

A bot of mass `30kg` starts running from rest along a circular path of radius `6m` with constant tangential acceleration of magnitude `2m//s^(2)`. After `2sec` from start he feels that his shoes started slipping on ground. The friction coefficient between his shoes and ground is `mu`.
Find `2/(mu)`. (Take `g=10m//s^(2)`)

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