A metal block of base area 0.2 m 2 is connected to a 0.02 kg mass via a string that passes over an ideal pulley as shown in figure. A liquid film of thickness 0.6 mm is placed between the block and the table. When released the block moves to the right with a constant speed of 0.17 m/s. The co-efficient of viscosity of the liquid is :

1. A. 3.45 10 3 Pa - s
2. B. 3.45 10 -2 Pa - s
3. C. 3.45 10 -3 Pa - s
4. D. 3.45 10 2 Pa - s

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