Buoyancy

An object will rise up in a fluid if

• Gravity and buoyant force equal

• Density of object and fluid is equal

• the buoyant force is stronger than gravity

• if the density of the object is greater than the fluid

An object will sink in a fluid if

• gravity is stronger than buoyant force

• buoyant force is stronger than gravity

• a fluid can be a gas or a liquid

• if the object is solid

What is buoyant force?

• A downward pushing force that a fluid pushes on an object

• A force that causes an object to sink

• A upward pushing force that a fluid pushes on an object

• The same as gravity

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

• Gravity

• Sinking

• Fish

• Displacement

An example of neutral buoyancy would be

• a fish swimming in the ocean

• A rowboat

• a rock a the bottom of the lake

• A scuba diver sitting in a boat

If a boat weighs 500 N. It moves 500 N water when it goes into the ocean. It will

• sink

• tip over

• float

• move faster

If an object displaces more fluid than the weight of the object, will the object sink or float?

• Sink
• Float

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. 

What is the volume of Object X?

• 10.0 cm³
• 15.0 cm³
• 20.0 cm³
• 25.0 cm³

What happens to a boat when cargo or a person is added?

• The draft decreases and the submerged volume increases
• The mass increases and the draft decreases
• The mass and density decrease and the submerged volume increase
• The mass and density increase, the draft increases and the submerged volume increases