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A person pushes horizontally with a force of $170.N$ on a $52\mathrm{.}0$ kg crate to move it across a level floor. The coefficient of kinetic friction is $0\mathrm{.}196.($a$)$ What is the magnitude of the frictional force? $($b$)$ What is the magnitude of the crate's acceleration? Use $g=9\mathrm{.}81\frac{m}{s^2}.$

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$($b$)$ Number

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