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Block and frictionA 4 kg red block is positioned at rest, 10 m high on a ramp as shown. The ramp is frictionless, other than a 10 cm long dark rough patch, that has a coefficient of kinetic friction of $\mu=0.3$. How far from the left edge of the rough patch will the block eventually come to rest for good (on the rough patch)? |

Group solutions work when someone suggests the next step toward this problem's solution.### Steps accepted thus far

- First, find out how much potential energy the box has, which is $mgh$ or $4\cdot 9.8\cdot 10$=$400$ J.

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