Fluid Mechanics Concepts and Principles

The video reviews fluid properties for AP Physics 2, covering phases of matter, density, and pressure. It explains the relationship between pressure and depth, fluid behavior in U-shaped tubes, and Archimedes' principle. Fluid dynamics are discussed with a focus on Bernoulli's equation, gauge pressure, and a lab experiment demonstrating fluid flow and projectile motion.

What is the primary characteristic that defines a fluid?

• It has a fixed shape.

• It can flow.

• It is always a liquid.

• It is always a gas.

How is the density of a fluid typically expressed?

• Mass per unit volume

• Mass per unit area

• Volume per unit mass

• Volume per unit area

What unit is used to measure pressure in the SI system?

• Newton

• Watt

• Pascal

• Joule

What happens to the pressure in a fluid as the depth increases?

• Pressure decreases

• Pressure remains constant

• Pressure increases

• Pressure fluctuates

In a U-shaped tube with different fluids, what determines the height of the fluid columns?

• The temperature of the fluid

• The density of the fluid

• The shape of the tube

• The color of the fluid

According to Archimedes' principle, what is the buoyant force on an object equal to?

• The volume of the object

• The density of the fluid

• The weight of the object

• The weight of the fluid displaced

What condition must be met for an object to float in a fluid?

• The object must be less dense than the fluid.

• The object must be the same density as the fluid.

• The object must be denser than the fluid.

• The object must be heavier than the fluid.

What does the continuity equation relate in fluid dynamics?

• Mass and energy

• Density and volume

• Area and speed of fluid

• Pressure and temperature

According to Bernoulli's theorem, what happens to fluid velocity as it passes through a narrow constriction?

• Velocity fluctuates

• Velocity decreases

• Velocity increases

• Velocity remains constant

What is gauge pressure?

• The pressure exerted by a fluid at rest

• The total pressure inside a container

• The pressure at the bottom of a fluid

• The difference between absolute pressure and atmospheric pressure