Lesson: Pascal’s Principle High School PhysicsPhysics
In this lesson, we will learn how to use Pascal’s principle to analyze the magnitude and direction of fluid pressure on an object.
Sample Question Videos
A cubic container holds water. The lid of the container can be pushed downward, exerting pressure on the water in the container. Which of the following statements most correctly describes how the pressure exerted by the water is changed when the lid is pushed downward?
A bag attached to an intravenous drip holds saline solution that has a density of 2,160 kg/m3. The bag is 15 cm in height and full to the top. The solution flows from the drip through a hole of area 0.785 cm2 and passes through the tube into a cannula that has an opening of area 0.0225 cm2.
What is the magnitude of the force exerted by the saline solution at the hole at the base of the drip bag? Give your answer to two decimal places.
What is the magnitude of the force exerted by the saline solution at the cannula? Give your answer to three decimal places.
A solid object falls through water of density 1,000 kg/m3. At the instant that the top of the object is 25 cm below the water’s surface, the water exerts a pressure on the top, bottom, and side of the object, as shown in the diagram.