Advertisements
Advertisements
प्रश्न
Why is it difficult to hold a school bag having a strap made of a thin and strong string?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Fill in the blank with suitable word :
If the area of a snow shoe is five times....................... than the area of an ordinary shoe, then the pressure of a snow shoe on the snow is five times...............
Pressure in a liquid ................with the depth.
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.
Describe the crushing tin can experiment. What do you conclude from this experiment?
An object is put one by one in three liquids having different densities. The object floats with `1/9, 2/11` and `3/7` parts of their volumes outside the liquid surface in liquids of densities d1, d2 and d3 respectively. Which of the following statement is correct?
The pressure in a liquid is the same at all depths.
Analogy
Liquid pressure: ______ :: Atmospheric Pressure: ______.
What is lateral 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.
