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प्रश्न
With an appropriate illustration prove that the force acting on a smaller area exerts a greater pressure.
उत्तर
Consider standing on loose sand. Your feet go deep into the sand. Now, when you lie down on the sand, you will find that your body will not go that deep into the sand. In both the cases the force exerted on the sand is the weight of your body which is the same. This force acting perpendicular to the surface is called thrust. When you stand on loose sand, the force is acting on an area equal to the area of your feet.
When you lie down, the same force acts on an area of your whole body, which is larger than the area of your feet. Therefore the effect of thrust, that is, pressure depends on the area on which it acts. The effect of thrust on sand is larger while ‘ standing than lying.
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संबंधित प्रश्न
The weight of the body immersed in a liquid appears to be______ than its actual weight.
On what factors the pressure exerted by the liquid depends on?
Liquid exerts pressure in the upward direction.
The external pressure applied to an incompressible liquid is transmitted uniformly throughout the liquid.
Write the equation for pressure due to the liquid column.
Derive an expression for Pressure due to the Liquid column.
Assertion (A): The weight of the truck exerts less pressure on the road.
Reason (R): The truck has six to eight wheels. As the area increases pressure decreases.
The total weight of a piece of wood is 6 kg. In the floating state in water its `1/3` part remains inside the water. On this floating piece of wood what maximum weight is to be put such that the whole of the piece of wood is to be drowned in the water?
