There is a floor that friction is proportional to its velocity (like F=−kv) and there is a box with its width as l and its height as h. (you may assume that l is longer than h). It is on the floor with the initial velocity v. Then, if v is big, I think it would rotate. But I don't know how to analyze this situation as differential equation.
This figure shows the situation it rotate as the ∠θ. But, as the initial time, θ is 0 so thus I think its friction would not be exerted at the left-bottom corner. So it will be different with this figure.
If there is no floor, the rotate pivot is just the center of mass I think. But there is a floor. It makes me crazy.
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