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प्रश्न
A dam has broader walls at the bottom than at the top. Give a reason.
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उत्तर
To withstand the greater pressure of water which increases with increase in depth.
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संबंधित प्रश्न
Fill in the blank with suitable word :
In fluids (liquids and gases), pressure acts in....................directions, and pressure.................as the depth increases.
What are fluids ? Name two common fluids.
A liquid exerts pressure in all directions.
Describe an experiment to show that the liquid pressure at a point increases with the increase in height of the liquid column above that point.
Which fact about liquid pressure does the diagram in fig. illustrate.
Figure shows a container filled with water. Which of the following statements is correct about pressure of water?
What is lateral pressure?
A solid floats in liquid with a portion of it being submerged. Then ______.
- The liquid exerts an upthrust equal to the weight of the solid
- The weight of the dispersed liquid is equal to the weight of solid
- Solid exerts a force equal to its weight on liquid
If the volume of the object is above the water surface, then the object is less dense.
Assertion (A): The force acting on the surface of a liquid at rest, under gravity, in a container is always horizontal.
Reason (R): The forces acting on a fluid at rest have to be normal to the surface.
