PRESSURE IN FLUIDS AND ATMOSPHERIC PRESSURE

A force of 100 N is exerted upon an enclosed liquid that is kept in a container whose cross sectional area is 100 cm². By what amount does the pressure on the liquid increase?

• Pressure doe not increase at all
• 1 Pa
• 100 Pa
• 100000 Pa

The points A, B, C, D and E are located at the same depth in an enclosed liquid. What is the increase at each of the points if the pressure in the liquid is increased by 50000 Pa?

• 10000 Pa at each point
• 50000 Pa at each point
• 250000 Pa at each point
• 5 Pa at each point

Which of the following is a statement of Pascal's Law?

• Pressure exerted anywhere in a confined liquid is transmitted equally in all directions throughout the liquid.

• Pressure exerted in an unconfined liquid is transmitted unequally in all directions throughout the liquid.

• Pressure exerted in a confined liquid is transmitted only perpendicularly.

• Force exerted anywhere in a confined liquid is transmitted equally in all directions throughout the liquid.

Which of the following machines work on Pascal's Law?

• Hydraulic Jack
• Hydraulic Brake
• Hydraulic Press
• All of the above

Which of the following expressions is correct for a hydraulic machine?

• F₁F₂ = A₁A₂

• F₂A₂ = F₁A₁

• F₂/A₂ = F₁/A₁

• F₁A₁ = F₂A₂

A force of 200 N is exerted upon the smaller piston of a hydraulic machine whose cross sectional area is 0.01 m². What weight will the hydraulic machine be able to lift if the larger piston has a cross sectional area of 2 m²?

• 4 N
• 400 N
• 40000 N
• 4000 N

The diameter of the smaller piston of a hydraulic machine is 'd' and the diameter of the larger piston is 'D'. A force F₁ is exerted upon the smaller piston that results in a force F₂ from the larger piston. Which of the following expressions is correct?

• F₂ / F₁ = D²/d²

• F2/F1 = D/d
• F₂ / F₁ = D³/d³

• F₂ / F₁ = D⁴/d⁴

The diameter of the smaller piston of a hydraulic machine is 30 cm and the diameter of the larger piston is 30 m. A force of 30 N is exerted upon the smaller piston. What is the output force?

• 30 N
• 3000 N
• 9000 N
• 300000 N

What is mechanical advantage (MA)?

• The ratio of the input force to the output force.

• The difference between the output force and input force.

• The sum of the input force and output force.

• The ratio of the output force to the input force.

What is the SI unit of thrust?

• Newton
• Pascal
• Dyne
• Joule