A ball has a diameter of 28 mm and falls in honey with a terminal velocity of 0.3 m/s. For honey, take Ph = 1360 kg/m³ and V₁ = 0.04 m²/s. Note: The volume of a sphere is V=T³. (Figure 1) Figure < 1 of 1 >

2. Two plates and a fixed surface sandwich two viscous fluid films as shown in the figure. The top plate moves with a velocity of 1.5 m/s and the lower plate is free to move under the influence of the viscous force applied to it. The contact areas for the lower surface of the upper plate is the same as the upper surface of the lower plate as well as the lower surface of lower plate and that of the fixed surface. The density of both fluid is 850 kg/m3. hı=2 mm, hz=1 mm, ui=0.2 Pas. u2=0.5 Pas. (a) After steady state conditions have been reached, what is the velocity of the lower plate? (b) What is the force per unit area imposed on the upper plate to maintain its velocity? Upper plate Viscous fluid 1 Lower plate I h2 Viscous fluid 2 Fixed surface

A flat-bottomed raft is traveling across a shallow lake at 6 ms-¹. The lake is 10 cm deep. If the raft has a surface area of 3 m² and the lake is full of water with viscosity of 0.001 Pa s, determine the force required to maintain the raft's speed. [0.18 N]

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