A plate of area 100cm2 is lying on the upper surface of a 2mm thick oil film. If coefficient of viscosity of oil is 15.5 poise then horizontal force (in N) required to move the plate with a velocity of 3cm/s will be
0.2325
2.325
23.25
232.5
As we learned
Viscous Force -
- wherein
Negative sign shows viscous force acts opposite to flow of liquid
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