Chapter 11 Forces in Fluids

Helpfulness: 0
Set Details Share
created 7 years ago by streece
337 views
updated 7 years ago by streece
Grade levels:
8th grade
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1

What is pressure?

the force exerted over on a surface divided by the total area over which the force is exerted

2

What is the unit of pressure?

pascal

3

What is a material that can easily flow?

fluid

4

When elevation increases, atmospheric pressure...?

decreases

5

Water pressure increases when depth...?

increases

6

How is atmospheric pressure measured?

barometer

7

How is density calculated?

Mass divided by volume

8

An upward force that acts on a submerged object is known as what?

buoyant force

9

Why does an object in water feel lighter?

the buoyant force acts in the direction opposite to gravity

10

What states that the buoyant force acting on a submerged object is equal to the weight of the volume of fluid displaced by the object?

Archimedes' principle

11

When force is applied to a confined fluid, the change in pressure is transmitted to what parts of the fluid?

all; equal parts

12

What principle states that pressure increases by the same amount throughout an enclosed or confined fluid?

Pascal's principle

13

What uses liquids to transmit pressure and multiply force in a confined fluid?

hydraulic system

14

What is an example of something that uses a hydraulic lift?

heavy construction equipment, car mechanic equipment, ladder on fire trucks, brakes on a car

15

What principle states that the faster a fluid moves, the less pressure it exerts?

Bernoulli's principle

16

A fluid flows from an area of high pressure to an area of what kind of pressure?

low

17

Give an example of something that is explained by Bernoulli's Principle.

how planes fly, how an atomizer works, why smoke rises up a chimney, how a flying disc glides through air

18

If you blow a stream of air between two balloons that are next to each other, the balloons...

move toward each other

19

Air above an airplane wing moves faster than the air below. What does this cause the plane to do?

increase its elevation

20

What are fluids made up of?

moving molecules that exert forces

21

A buoyant force always acts in what direction?

upward

22

If an object sinks in a bucket of water, what can be said about the density of the object?

it is more than the density of water

23

A hydraulic system uses fluid to?

multiply force

24

How does fluid pressure relate to the motion of a fluid?

the faster the fluid moves the less the pressure

25

A ship's ability to float in water is explained by what principle?

Archimedes