Buoyancy

Multiple Choice

If an object sinks in a fluid, _____.

• the density of the fluid is greater than the density of the object
• the density of the fluid is less than the density of the object
• the density of the fluid is equal to the density of the object
• density has nothing to do with whether an object sinks or floats, only which state of matter the object is

Multiple Choice

The upward force exerted by a fluid is called the...

• buoyancy force

• density force

• fluidity force

• normal force

Multiple Choice

 The buoyant force on an object is equal to the weight of the fluid displaced by the object is stated in 

• Pascal's principle.
• Archimedes' principle.
• Boyle's law.
• Bernoulli's principle.

Poll

Which object will float?

• Object A

• Object B

• Object C

• Object D

Multiple Choice

If the density of an object is greater than the density of water, it will

• sink

• float

• fly

Multiple Choice

How do steel ships float, even though steel is denser than water?

• Boats are not made of steel

• Boats can only float in salt water

• The density of the steel is reduced by hollowing out the boat to increase its volume.

Multiple Choice

Since a full ship has more mass than an empty ship, a full ship must displace more water to make it buoyant (make it float).

• true

• false

Multiple Choice

The less dense an object is means it will...

• Float

• Sink

Multiple Choice

The more dense an object is means it will...

• Float

• Sink

Multiple Choice

Buoyancy is the tendency for objects to float in a fluid. We consider buoyancy the...

• Un-gravity force

• The upward force

• Gravitational pull

• Downwards pull on an object

Poll

Predict what happens when a can of regular coke and a can of diet coke is placed into regular tap water. Sink or Float?

• Regular coke sinks

• Regular coke floats

• Diet coke sinks

• Diet Coke floats