Buoyancy and Fluid Mechanics Quiz

What force allows objects to float in a fluid?

• Gravity

• Friction

• Buoyant force

• Centripetal force

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

• The mass of the object

• The weight of the fluid displaced by the object

• The density of the fluid

• The weight of the object

If a helium-filled balloon floats in the air, this means:

• Its weight is greater than the weight of the displaced air

• Its weight is equal to the weight of the displaced air

• Its density is greater than air's density

• There is no buoyant force acting on it

What happens when the average density of an object is greater than the density of the fluid it is in?

• The object sinks

• The object floats

• The object remains suspended in the fluid

• The object moves upward indefinitely

A fish can control its buoyancy in water by:

• Increasing its weight

• Changing the volume of a gas-filled cavity inside its body

• Decreasing the density of water

• Increasing its surface area

When comparing seawater and freshwater, a person will float higher in:

• Freshwater

• Seawater

• Both equally

• It depends on body mass

The purpose of a hydrometer is to measure:

• The buoyant force on an object

• The density of a liquid

• The viscosity of a fluid

• The temperature of a fluid

The buoyant force acting on an object in a fluid depends on:

• The object’s shape

• The object's color

• The volume of the fluid displaced

• The object's weight

What principle states that the buoyant force is equal to the weight of the displaced fluid?

(a)  

What is the term for the upward force exerted by a fluid on an immersed object?

(a)