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গতীয় ঘর্ষণ কোণ হল-

\tan^{- 1} \frac{F_{x}}{R}

\tan^{- 1} \frac{R}{F_{g}}

\tan^{- 1} \frac{F_{g}}{R}

\tan^{- 1} \frac{F_{x}}{R^{2}}

ANS : 1

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