![]() ![]() ![]() † † margin: y y x - 2 - 1 1 2 - 2 - 1 1 2 50 water line not to scale d ( y ) = 50 - y Figure 6.5.8: Measuring the fluid force on an underwater porthole in Example 6.5.4. The truth is that it is not, hence the survival tips mentioned at the beginning of this section. This is counter-intuitive as most assume that the door would be relatively easy to open. Most adults would find it very difficult to apply over 500 lb of force to a car door while seated inside, making the door effectively impossible to open. What will be the ratio of the hydrostatic force exerted on the base and on any one of the vertical sides. 3 ¯, - 2.25 ) ( 0, - 2.25 ) ( 0, 0 ) y y x Figure 6.5.7: Sketching a submerged car door in Example 6.5.3. A cubic tank is completely filled with water. Using the weight-density of water of 62.4 lb/ft 3, we have the total force as We adopt the convention that the top of the door is at the surface of the water, both of which are at y = 0. Its length is 10 / 3 ft and its height is 2.25 ft. ![]() SolutionThe car door, as a rectangle, is drawn in Figure 6.5.7. ![]()
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