Buoyancy and Archimedes' Principle

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. 

An object should float in a liquid if...

• Its denser than the liquid

• It's the same density as the liquid

• It's less dense than the liquid

Label the two arrows with the correct force

a

b

Displacement

Gravity

Density

Buoyancy

Tags

NGSS.MS-PS2-4

Why does the Screw SINK in Honey?

• The screw is less dense than the honey

• The screw is more dense than the honey

• the screw has the same density as the honey

Tags

NGSS.MS-PS1-2

The weight of the fluid that an object displaces is equal to the buoyant force acting on the object

• Archimedes' Principle

• Bernoulli's Principle

• Pascal's Principle

If an object has ​ ​ (a)   buoyancy, It will float

If an object has ​ (b)   buoyancy, it will sink

If an object has ​ (c)   buoyancy, it will "flink"

• positive

• negative

• neutral

• greater

• less

• equal

• Archimedes'

What is buoyant force?

• An upward force exerted by fluids on an object.

• An downward force exerted by fluids on an object.

If an object has a density of 1.03 g/ml, will it float or sink in water? (Assume fresh water)

• True

• False

• Float

• Sink

Answer explanation

The density of fresh water is 1.0g/cm^3. This is LESS than the density of the object. Therefore, the object will sink.

When an object is immersed in a fluid, it pushes the fluid out of the way and takes its place. This is ...

• Gravity

• Buoyancy

• Density

• Displacement

Buoyancy is best described as

• the force which allows that would normally sink to float

• a force which pulls objects toward the center of the earth

• mass minus volume

• a lifeboat

Answer explanation

Aerogel is so buoyant it could carry about 1000 grams of cargo!!!