Chapter 3 | Pressure Exerted By Fluids

Question 1

What happens if we increase the force exerted by a fluid?

Answer 1

It increases the pressure.
Ex:
F1          F2
—  —> —
A1          A1

Question 2

What happens if we increase the area where the force is being exerted?

Answer 2

The pressure decreases.
Ex:
F1.         F1
— —> —
A1         A2

Question 3

How does pressure act IN a fluid?

Answer 3

• Pressure will increase as depth increases

- Pressure will increase as fluid density increase

Question 4

How does pressure work in compressible fluids? (Gases)

Answer 4

• Gas particles move randomly in all directions and bounce off of obstacles
• Each collision exerts pressure
  (More collisions = higher pressure)

Question 5

Factors that affect the number of collisions:

Answer 5

• The number of particles
• The temperature of the fluid
• The size of the container (the volume)

Question 6

What’s important to note about Liquids and Gases?

Answer 6

Liquids and Gases move randomly

- But at any point, the pressure is measured the same