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Question
Why does it happen?
The wall of a dam is broad at its base.
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Solution
We know the pressure of liquid increases with depth. So, the wall of a dam is made broader at its base so that it is able to withstand the heavy pressure exerted by the river water.
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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.
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.
