Forces in Fluids

Question 0

what causes pressure in fluids

Answer 0

all the forces exerted by the individual molecules in a fluid add together to make the pressure exerted by the fluid

Question 1

Pressure

Answer 1

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

Question 2

Whats a pascal?

Answer 2

a unit of pressure: 1N/m2

Question 3

Whats the formula for Pressure?

Answer 3

Force/ Area

Question 4

if Area increases Pressure ___________

Answer 4

Decreases

Question 5

If Force increases, pressure_____________

Answer 5

Increases

Question 6

Air is a _________

Answer 6

FLuid

Question 7

How does pressure relate to elevation?

Answer 7

The higher the elevation, the lower the pressure or vice versa

Question 8

How does water pressure relate to depth?

Answer 8

Lower the depth of water, the higher the pressure

Question 9

Whats a fluid?

Answer 9

a substance whose shape can easily change

Question 10

What is pascals principle?

Answer 10

When force is applied to a confined fluid, pressure increases equally to all parts of the fluid

Question 11

What is a fluid filled tube that multiples the force applied by the smaller piston?

Answer 11

Hydraulic system

Question 12

What is an example of a hydraulic system?

Answer 12

Brakes in a car

Question 13

Whats a force pump?

Answer 13

When a system has pressure on one end and a whole in the other, force the fluid out.

Question 14

What an example of a force pump?

Answer 14

A toothpaste tube

Question 15

Whats a force pumped used for?

Answer 15

to move a fluid from one place to the other by increasing the pressure on the fluid

Question 16

If both pistons have the same area they will also experience the same ___________

Answer 16

force

Question 17

Buoyant force-

Answer 17

a force that acts on submergedobjects

Question 18

Water displacemant-

Answer 18

submerged objects take up space and displace water equal to its volume

Question 19

Archimedes principle-

Answer 19

states that buoyant force on an object is equal to the weight of the fluid thats displaced by an object

Question 20

Density-

Answer 20

its mass per unit volume

Question 21

Why does an object feel lighter when its underwater than when its in the air?

Answer 21

Because it has a buoyant force acting on it against gravity

Question 22

If an object floats on the surface and displaces 10 cm how much does that object weigh ?

Answer 22

10 grams

Question 23

if an object sinks its density is________

Answer 23

grater than the density of the fluid

Question 24

If an object floats on the surface _________________

Answer 24

its density is less than the density of the fluid.

Question 25

If an object floats at constant level________________

Answer 25

Its density is equal to the density of the fluid

Question 26

Bernouli's princlple

Answer 26

States that pressure exerted by moving fluid is less than the pressure of the surrounding area

Question 27

Is the upside down wing being pushed upward or downward?

Answer 27

Downward

Question 28

If the wind speeds up what will happen to the force pushing on the wing?

Answer 28

There is less pressure on the top of the wing and more pressure on the bottom which causes lift

Question 29

On a fireplace...... As the wind speeds uo, what happens to the speed of the rising smoke in the chimney?

Answer 29

The smoke will rise faster because there is less pressure outside the chimney because of them moving fluid. inside there is more pressure.

Question 30

What makes a difference with walking on snow shoes help you in the snow?

Answer 30

The different size of area on which your weight is distributed lowers the pressure you put o the snow

Question 31

Why is there more pressure when you have on high heels than when you have on normal shoes?

Answer 31

Because there is less area which increases the pressure applied to a surface

Question 32

What are two examples of Pascals principle?

Answer 32

Brakes and a hydraulic lift

Question 33

What causes air planes to fly?

Answer 33

When pressure exerted by a moving fluid is less than the pressure of the surrounding fluid it causes lift, which makes a plane fly

Question 34

Does air move faster on the top of the wing or at the bottom?

Answer 34

The top

Question 35

How did the egg fit in the bottle?

Answer 35

Beacause there was a difference in air pressure, and there is pressure oushing from all side, which caused the egg in sqush in which let in go through the bottle.

Question 36

The more volume an object has the more___________

Answer 36

Water it displaces

Question 37

What are 2 examples of Bernoulis principle?

Answer 37

The shower curtain and a fir place

Question 38

What direction does a bouyant force act?

Answer 38

Upward

Question 39

If the force on an object in the air is 9.8 then it is placed in the water and the force is now 7.8. Whats the bouyant force on the object

Answer 39

2 Newtons