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TomRichter
1 year ago

Why is in solution the size 2*hb+bB ? I thought it is 2*hb+bB .

And where’s the problem? I read the same expression twice.

My idea of the “frictioning surface” in an open trough: you idealize this as a rectangular cross section, then the underside and twice the side wall, but no friction takes place at the top.