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Chapter 15: Problem 3

Water pressure at the bottom of the ocean arises from the weight of the overlying water. Does this mean that the water exerts pressure only in the downward direction? Explain.

Short Answer

Expert verified
No, the water doesn't exert pressure only in the downward direction. In a fluid such as water, the pressure acts in all directions. So, under the ocean, the water exerts pressure downwards, upwards, and sideways.

Step by step solution

01

Understand the nature of fluid pressure

The first thing to grasp is that the pressure in a fluid at any point is exerted in all directions. The environment around a certain point in the fluid is subjected to the same amount of pressure. As a result, beneath the ocean, the water pressure is not just downwards, but also in every other direction.
02

Analyze the role of weight in pressure

The weight of the overlying water does apply pressure to the water below it, but it doesn't mean that this pressure is only downwards. The pressure coming from the weight of the overlying water is distributed equally throughout the fluid in all directions.
03

Provide real-world examples

For example, submarine hulls feel the pressure from the outside equally across their surface, not just pushing downwards but also against the sides. Similarly, a diver in the ocean experiences water pressure from all directions, not just from above.

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