Advertisements
Advertisements
Question
Consider the equations `P=lim_(triangles->0)"F"/(triangle"S")` and P1 - P2 = pgz. In an elevator accelerating upward
Options
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
Solution
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
RELATED QUESTIONS
A piece of wood is floating in water kept in a bottle. The bottle is connected to an air pump. Neglect the compressibility of water. When more air is pushed into the bottle from the pump, the piece of wood will float with
State Pascal's law of transmission of pressure.
Name two applications of Pascal's law.
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 ?
Select the correct option.
A dam for water reservoir is built thicker at the bottom than at the top because
Select the correct option.
Pressure at a point inside a liquid does not depend on
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?
What are the factors on which the pressure of a liquid depends?
State the principle on which Brahma press depends.
The density of iron is 7800 kg m-3. What do you mean by this statement? What is density of water at 40C?
For what purpose is the acid battery hydrometer used?
Hydraulic lift works under the principle of _______.
Assertion: Pascal’s law is the working principle of a hydraulic lift.
Reason: Pressure is thrust per unit area.
