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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
State the units in which pressure is measured.
Fill in the blank with suitable word :
In fluids (liquids and gases), pressure acts in....................directions, and pressure.................as the depth increases.
Gases exert pressure in all directions.
Describe a suitable experiment to demonstrate that a liquid exerts pressure sideways also?
Describe a simple experiment to show that at a given depth, a liquid exerts same pressure in all directions.
State two factors on which the pressure at a point in a liquid depends.
The air pressure on our body is equal to ______ pressure.
Describe an experiment to prove that the pressure in a liquid increase with depth.
State whether the liquids and gases also exert 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.
