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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A thin plate AB of large area A is placed symmetrically in a small gap of height h filled with water of viscosity η 0 ​ and the plate has a constant velocity v by applying a force F as shown in the figure. If the gap is filled with some other liquid of viscosity 0.75η 0 ​ , at what minimum distance (in cm) from top wall should the plate be placed in the gap, so that the plate can again be pulled at the same constant velocity V, by applying the same force F? (Take h = 20 cm).

A thin plate AB of large area A is placed symmetrically in a small gap of height h filled with water of viscosity η 0 ​ and the plate has a constant velocity v by applying a force F as shown in the figure. If the gap is filled with some other liquid of viscosity 0.75η 0 ​ , at what minimum distance (in cm) from top wall should the plate be placed in the gap, so that the plate can again be pulled at the same constant velocity V, by applying the same force F? (Take h = 20 cm).

A water drop and a mercury drop is taken inside identical horizontal conical pipes. Then