A dam has broader walls at the bottom than at the top. Give a reason.

Answer in Brief

To withstand the greater pressure of water which increases with increase in depth.

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Chapter 3 Force and Pressure
Short/Long Answer Questions | Q 34 | Page 57

What force acting on an area of 0.5 m² will produce a pressure of 500 Pa ?

Fill in the blank with suitable word :

In order to sink in a fluid, the density of an object must be .................. than the ................ of the fluid.

Describe an experiment to show that a liquid exerts pressure at the bottom of the container in which it is kept.

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.

Describe the crushing tin can experiment. What do you conclude from this experiment?

Liquid pressure decreases with the decrease of depth.

State whether true or false. If false, correct the statement.

The shape of an object helps to determine whether the object will float or not

What is lateral pressure?

Water (or) liquids exert pressure on ______.

A solid floats in liquid with a portion of it being submerged. Then ______.