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Consider a rectangular block of wood mov...

Consider a rectangular block of wood moving with a velocity `v_(0)` in a gas at temperature T and mass density `rho` . Assume the velocity is along X-axis and area of cross section of the block perpendicular to `v_(0)` is A. Show that the drag force on the block is `4(rho) A v_(0) (sqrt(KT))/(m)` , where m is the mass of the gas molecule.

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