Answer
$d=\frac{\mu v A}{F}=\frac{(3.5\times10^{-5}*50*0.08)}{1.2}=11.7\times10^{-4}$
Work Step by Step
$\tau=\mu{\frac{v}{d}}$
$F=\tau A=\mu{\frac{v}{d}}*A$
$d=\frac{\mu v A}{F}=\frac{(3.5\times10^{-5}*50*0.08)}{1.2}=11.7\times10^{-4}$
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