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A metal plate of area 500 cm^92) is kept...

A metal plate of area `500 cm^92)` is kept on a horizontal surface with a layer of oil of thickness `0.5` mm between them. The horizontal force required to drag the plate with a velocity of 2 cm/s is
(coefficient of viscosity `=0.9` kg/ms)

A

180 N

B

18 N

C

`0.018` N

D

`1.8 N`

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The correct Answer is:
D
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