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प्रश्न
Why is it difficult to hold a school bag having a strap made of a thin and strong string?
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उत्तर
- We know that pressure is equal to force divided by area. When the school bag's string is thin, its area is small, resulting in increased pressure on the shoulders or hands supporting the bag.
- In this situation, the force applied to the shoulders or hands that support the bag is equal to the weight of the bag.
- If the strap is wide, as it normally is, the area on which the force (weight of the bag) operates is big, and the pressure is lessened because the weight of the bag is now distributed over a broader area.
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संबंधित प्रश्न
Name the quantity whose one of the units is pascal (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.
State two factors on which the pressure at a point in a liquid depends.
The size of an air bubble rising up in water ______.
The pressure in a liquid is the same at all depths.
What is lateral pressure?
Name an instrument used to measure the difference in the liquid pressure.
Water (or) liquids exert pressure on ______.
How will you calculate fluid pressure?
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.
