A thin plate is being pulled upward with F = 0.2 lbs through glycerin at 68°F between two stationary walls, as shown in the figure below. The plate has a height of 9 inches, a width (into the page) of 3 inches, and a negligible thickness. If the plate is moving upward at a steady velocity of 10 ft/s, what is the mass of the plate? 9 in WALL F 0.1 in 0.2 in WALL plate glycerin

Which of the two walls in Figure below gives the larger horizontal force? (Show calculations.)

A vertical rectangular plate is submerged half in oil (s = 0.8) and half in water such that its top edge is flushed with the oil surface. What is the ratio of the force exerted by water on the lower half to that by oil acting on the upper half?