science bouyancy test Flashcards
Where is the origin of the word buoyant? Like where is it from and what is the Spanish word?
Boyar means to float.
What does buoyant mean?
To float
- buoyant force
An upward force applied by a fluid on an object in the fluid.
Why can you lift someone in water who you could not lift when you are both out of water?
It is because of buoyant force. And your muscles.
What do they mean when they say “acts on any object in a liquid”? Explain what the word act means.
The force is applied on to the object in a liquid.
Question: When they say acts on “any object”, give two places in the water column that the buoyant force acts and give examples of each.
Floating objects
Rafts
Ships
Submerged objects
Such as rocks as the bottom of the lake.
What keeps a helium balloon floating in the air?
Buoyant force In the air is stronger than the gravitational force.
If a buoyant force keeps a helium balloon in the air, what does this indicate?
Gravitational force is pulling downward.
Why do you think helium balloons begin to sink after a few days?
The gas starts to run out. And shrink after days.
In what direction does fluid apply pressure to the sides of an object within it? Think about what you know from Lesson 1.
All perpendicular sides
With what you know from question 1 in this section, the forces from water pressure on divers are in what two directions?
Horizontal forces on each side is equal. And vertical
Which forces on the sides of a diver under water are equal?
Horizontal
Which forces on the sides of a diver under water are NOT equal?
vertical
Why are the forces that are not equal…not equal?
One diver is deeper than the other.
What is the difference between the upward force from pressure and the downward force from pressure on a diver that is under the water?
Pressure is greater on the bottom.
