A penny is placed at the outer edge of a disk (radius = 0.112 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.82 s. Find the minimum coefficient of friction necessary to allow the penny to rotate along with the disk.

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Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.