There is a 2 mm thick layer of glycerine between a flat plate of area 100 cm2 & a big fixed plate. If the coefficient of viscosity of glycerine is 1.0 kg/m-s then how much force is required to move the plate with a velocity of 8 cm/s?

Engineering

Physics

SI Units

Acceleration

Viscosity and Terminal Velocity New

Question

There is a 2 mm thick layer of glycerine between a flat plate of area 100 cm² & a big fixed plate. If the coefficient of viscosity of glycerine is 1.0 kg/m-s then how much force is required to move the plate with a velocity of 8 cm/s?

4.0 N

0.8 N

1.6 N

0.4 N

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$F = ηA \frac{v}{y} = 1 \times 10^{- 2} \times \frac{8 \times 10^{- 2}}{2 \times 10^{- 3}} = 0 .4 N$