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A thin square plate of side varphi=10 cm...

A thin square plate of side `varphi=10 cm` is dragged with constant velocity v=3 cm/s in an oil . The width 'd' of the oil column is 2mm. Square plate is placed symmetrically as shown in the figure. Assumed velocity of layer of oil at the end is negligible. The coefficient of viscosity is 150 poise. Find the horizontal force (in Newton) required to move the square plate with constant velocity

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