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21 July, 15:34

A 10 kg block slides on a frictionless surface at 10 m/s. It hits a rough patch 3 meters long with a coefficient of kinetic friction of 0.4. When it reenters the frictionless surface, how fast is it going?

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  1. 21 July, 15:57
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    12 MPH

    I DIDNT do the math my brother did hes in colledge so good lucks guys
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