Understanding Fluid Pressure

What is Pascal's Principle and how is it applied in hydraulic systems?

• Hydraulic systems operate by creating a vacuum to lift objects.

• Pascal's Principle states that pressure decreases with depth in a fluid.

• Pascal's Principle is only applicable in open fluid systems.

• Pascal's Principle states that pressure applied to a confined fluid is transmitted equally in all directions, and it is applied in hydraulic systems to multiply force.

Calculate the pressure at a depth of 10 meters in water. (Density of water = 1000 kg/m³)

• 95000 Pa

• 98100 Pa

• 100000 Pa

• 98000 Pa

Explain how a hydraulic lift works using Pascal's Principle.

• A hydraulic lift operates by creating a vacuum to pull the load upwards.

• A hydraulic lift works by applying pressure to a fluid in a confined space, allowing a small force to lift a larger load, as explained by Pascal's Principle.

• A hydraulic lift uses a pulley system to lift heavy objects.

• A hydraulic lift relies on mechanical gears to amplify force.

If a force of 200 N is applied on a piston with an area of 0.5 m², what is the pressure exerted?

• 400 Pa

• 200 Pa

• 800 Pa

• 1000 Pa

Determine the pressure exerted by a liquid column of height 5 m. (Density = 800 kg/m³)

• 32000 Pa

• 48000 Pa

• 39240 Pa

• 25000 Pa

How does atmospheric pressure change with altitude?

• Atmospheric pressure remains constant with altitude.

• Atmospheric pressure decreases with altitude.

• Atmospheric pressure fluctuates randomly with altitude.

• Atmospheric pressure increases with altitude.

If the atmospheric pressure at sea level is 101325 Pa, what is the pressure at a height of 1 km? (Assume a decrease of 12 Pa/m)

• 100000 Pa

• 89325 Pa

• 85000 Pa

• 90000 Pa

What is the relationship between pressure, force, and area?

• Pressure is the same as force.

• Force is calculated by multiplying pressure and area.

• Area is irrelevant to pressure calculations.

• Pressure is the force applied per unit area (P = F/A).

Explain how pressure in a fluid is transmitted in all directions.

• Pressure is only transmitted in the direction of the applied force.

• Pressure in a fluid is transmitted equally in all directions due to molecular collisions and the incompressibility of the fluid.

• Pressure in a fluid only acts downward due to gravity.

• Fluids can be compressed, which affects pressure transmission.

Calculate the pressure at a depth of 20 m in a liquid with a density of 1200 kg/m³.

• 150000 Pa

• 300000 Pa

• 180000 Pa

• 235440 Pa