Advertisements
Advertisements
प्रश्न
Two cylindrical vessels fitted with pistons A and B of area of cross-section 8 cm2 and 320 cm2 respectively are joined at their bottom by a tube and they are completely filled with water. When a mass of 4 kg is placed on piston A, Find:
- the pressure on piston A,
- the pressure on piston B, and
- the thrust on piston B.
Advertisements
उत्तर
Given that the force applied to the smaller piston A is 4 kg
Area of cross-section of piston A = 8 cm²
Area of cross-section of piston B = 320 cm²
(i) Pressure acting on piston A in the downward direction = `"Thrust"/"Area"`
= `(4 "kg")/(8 "cm"^2)`
∴ Pressure acting on piston A = 0.5 kg cm-2
(ii) According to Pascal's Law
Pressure acting on piston B = Pressure acting on Piston A = 0.5 kg cm-2
(iii) Thrust acting on piston B in the upward direction
= Pressure × Area of B
= 4 kg × `(320 "cm"^2)/(8 "cm"^2)`
∴ Thrust acting on piston B in the upward direction = 160 kgf.
APPEARS IN
संबंधित प्रश्न
A body experiences the same buoyant force when it floats or sinks in water.
A body floats in a liquid when its weight becomes equal to the weight of the liquid displaced by its submerged part.
Why does it happen?
A ship dips to a larger depth in fresh water as compared to marine water.
Describe a simple experiment to demonstrate that a liquid enclosed in a vessel exerts pressure in all directions.
Complete the following sentence :
Pressure at a depth h in a liquid of density p is ......................
Select the correct option.
Thrust acting perpendicularly on the unit surface area is called
Pressure in a water pipe on the ground floor of a building is 100,000 Pa. Calculate the pressure in the water pipe on the first floor at a height of 3 m. [Density of water = 1000 kgm−3 ; g = 10 ms−2]
What is meant by up thrust?
In a fluid, buoyant force exists because the pressure at the ______ of an object is greater than the pressure at the top.
Complete the analogy.
Downward force : Weight :: Upward force offered by liquid : _____.
