Fluid mechanics

According to Archimede's principle, if a body is immersed partially or fully in a fluid then the buoyancy force is _______ the weight of fluid displaced by the body.

• equal to

• less than

• more than

• unpredictable

All fluids are:

• gases

• liquids

• gases or liquids

• non-metallic

Archimedes' Principle states that... 

• The buoyant force acting on an object equals the volume of the fluid displaced by the object. 
• The buoyant force acting on an object equals the weight (force of gravity) of the fluid displaced by the object.
• The buoyant force acting on an object will always be equal. 

A buoyant force is an upward force applied on an object by a 

• Substance
• Fluid
• Pressure
• Displacement

Tags

NGSS.MS-PS2-5

A buoyant force is a(n) ______ force 

• Upward
• Downward
• Side ways

An object will _______ if the weight of it is equal to the weight of the water in which it is in. 

• Float
• Sink
• Expand
• Shrink

An object will ______ if its' density is greater than the density of the fluid it is in. 

• Expand
• Shrink
• Float
• Sink

What is true about the volume of displaced fluid for an object that is completely submerged?

• The volume of displaced fluid is equal to the object’s volume.

• The volume of displaced fluid is less than the object’s volume.

• The volume of displaced fluid is greater than the object’s volume.

• The volume of displaced fluid is not related to the object’s volume.

If an object weighing 50.0 N displaces a volume of water with a weight of 10.0 N, what is the buoyant force on the object?

• 60.0 N

• 50.0 N

• 40.0 N

• 10.0 N

Which of the following statements is true about the buoyant force on an object that is floating on the surface of a lake?

• The buoyant force is greater than the weight of the object.

• The buoyant force is equal to the weight of the fluid displaced.

• The buoyant force is the same as when the object is completely submerged.

• The buoyant force is less than the density of the water.