Advertisements
Advertisements
प्रश्न
Consider the equations `P=lim_(triangles->0)"F"/(triangle"S")` and P1 - P2 = pgz. In an elevator accelerating upward
पर्याय
both the equations are valid
the first is valid but not the second
the second is valid but not the first
both are invalid
Advertisements
उत्तर
the first is valid but not the second
For a point inside the elevator, pressure can be defined as `P=lim_(triangles->0)"F"/(triangle"S")`. It is independent of the acceleration of the elevator.
The modified form of the second equation, which will be valid in the given case, is given by P1 - P2 = ρ(g+a0)z
Here, acceleration a0 (say) due to elevator accelerating upwards is also taken into account.
APPEARS IN
संबंधित प्रश्न
Define one pascal (Pa), the S.I. unit of pressure.
In a hydraulic machine, a force of 2 N is applied on the piston of area of cross section 10 cm2. What force is obtained on its piston of area of cross section 100 cm2 ?
What should be the ratio of area of cross section of the master cylinder and wheel cylinder of a hydraulic brake so that a force of 15 N can be obtained at each of its brake shoe by exerting a force of 0.5 N on the pedal ?
What force is applied on a piston of area of cross section 2 cm2 to obtain a force 150 N on the piston of area of cross section 12 cm2 in a hydraulic machine?
Select the correct option.
One Pascal is equal to
Select the correct option.
A dam for water reservoir is built thicker at the bottom than at the top because
Select the correct option.
The pressure exerted by 50 kg (g = 10 m/s−2) on an area of cross-section of 2 m2 is
Define the SI unit of pressure.
How does the liquid pressure on a diver change according to the following condition:
When the driver moves to the greater depth?
State Pascal's law.
What is the principle of a hydraulic machine?
State the principle on which Brahma press depends.
State two uses of a hydraulic press.
State and explain Pascal's law of transmission of pressure.
Hydraulic lift works under the principle of _______.
An iceberg of density 700 kg/m3 is floating in the water of density 1000 kg/m3. The percentage of the volume of ice cube outside the water is:
