A layer of glycerine of thickness 1 mm present between a large surface area of 0.1 m². With what force the small surface is to be pulled, so that it can move with a velocity 1 m/s, given that the coefficient of viscocity =0.07 kg m⁻¹ s⁻¹

Options

(a) 5 N
(b) 7 N
(c) 4 N
(d) 3 N

Correct Answer:

7 N

Explanation:

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