Pascal's Hydraulic Calculation

In the figure below, a hydraulic press is used to lift up a mass 𝑀 a distance of 1 cm. If the efficiency of the press is 90% and the work exerted on the smaller piston is 800 J. Calculate the maximum mass which can be lifted by the press.

• 90.61 kg

• 73.4 kg

• 7‎20 kg

• 8‎88.9 kg

Tags

NGSS.HS-PS2-1

NGSS.HS-PS3-1

In a car lift, compressed air exerts a force, F₁ on a small piston having a radius of 5.5 cm. This pressure is transmitted to a second piston of radius 20 cm as shown in figure above. The mass of the car is 1250 kg.

Calculate the pressure on the smaller piston F_1.

• 6.25 kPa

• 61.31 kPa

• 97.57 kPa

• 306.56 kPa

What is the greatest benefit of using hydraulics?

• The multiplication of speed

• The multiplication of operating time

• The multiplication of fuel efficiency

• The multiplication of force

Tags

NGSS.MS-PS2-1

As the area a force acts on increases, the force exerted on each unit of area

• increases

• decreases

• remains constant

Which statement correctly describes pressure?

• the applied force that acts on an object

• force per unit area

• the area to which a force is applied

• force times surface area

Fluids can be...

• solids
• liquids
• gases
• liquids or gases

Tags

NGSS.MS-PS3-4

What is the pressure in the hydraulic fluid?

• 1210 N
• 484 N/m²
• 8000 N
• 3025 N/m²

A force is applied in a closed container, the pressure increases the same amount. EX: squeezing a water bottle or toothpaste

• Archimede's Principle
• Pascal's Principle
• Bernoulli's Principle 

Pressure can be measured in Pascals (Pa) or Newtons per square meter.

1 Pa = 1N/m²

• True

• False

The amount of force pushing on an area is the definition of....

• Fluid
• Viscosity
• Barometer
• Pressure