3. The space between two parallel plates 5 mm apart is filled with crude oil. A force of 2 N is required to drag the upper plate at a constant velocity of 0.8 m/s. The lower plate is stationary. The area of the upper plate is 0.09 m². Determine: (i) The dynamic viscosity, and (ii) the kinematic viscos- ity of the oil in stokes if the specific gravity of oil is 0.9. [Ans. (i) 1.39 poise, (ii) 1.52 stokes]

A sled with two runners slides along a thin horizontal layer of water between the ice and the runners. The horizontal force that the water puts on the runners is equal to 2.4 lb when the sled's speed is 50 ft/s. The total area of both runners in contact with the water is 0.04 ft2, and the viscosity of the water is 3.5x10 lbs/ft2. Determine the thickness of the water layer under the runners. Assume a linear velocity distribution in the water layer.

5Q. The plate is moving at 0.6 mm/s when the force applied to the plate is 4 mN. If the surface area of the plate in contact with the liquid is 0.5 m², determine the approximate viscosity of the liquid, assuming that the velocity distribution is linear. The thickness of the liquid layer is 4 mm. 0.6 mm/s 4 mm 4 mN

A plate separated by 0.1 mm from a fixed plate moves at 0.10 m/s under a force per unit area of 2.0 N/m2. Determine the viscosity of the fluid between the plates. Give your answer in units of mPaos and round to the nearest whole number.