A metal plate 5 cm × 5 cm rests on a layer of castor oil 1 mm thick whose coefficient of viscosity is 1.55 Nsm-2. Find the horizontal force required to move the plate with a speed of 2 cms-1

1
0.0066 N
2
0.8745 N
3
0.0775 N
4
0.0055 N

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