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
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
Draw a simple diagram of a hydraulic jack and explain its working.
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 ?
The areas of pistons in a hydraulic machine are 5 cm2 and 625 cm2. What force on the smaller piston will support a load of 1250 N on the larger piston? State any assumption which you make in your calculation.
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?
66640 Pa pressure is exerted by 0.50 m vertical column of a liquid. If g = 9.8 Nkg−1, calculate the density of the liquid.
Select the correct option.
Pressure applied in liquids is transmitted with undiminished force
Select the correct option.
A dam for water reservoir is built thicker at the bottom than at the top because
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.
State two applications of Pascal's law.
State the principle on which Brahma press depends.
State Pascal’s law.
What are Force multipliers?
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:
