11.4: Fluid Mechanics

Question 1

Drag force definition:

Answer 1

• the force that acts in the opposite direction to motion

Question 2

Streamlining definition:

Answer 2

-involves shaping a body so it can move as effectively and quickly through a fluid as possible.

Question 3

Lift force definition:

Answer 3

• causes a body to move perpendicular to the direction of travel.

Question 4

Angle of attack definition:

Answer 4

• the tilt of a projectile relative to the air flow.

Question 5

Bernoulli principle definition:

Answer 5

• where air molecules exert less pressure the faster they travel and more pressure when they travel slower.

Question 6

What is fluid mechanics?

Answer 6

• the study of an object or human body that travels through any liquid or gas.
• for example, a swimmer travels through water and a tennis ball through the air. They are both slowed down by either friction or drag.

Question 7

What is dynamic fluid force?

Answer 7

• fluid dynamics is concerned with the movements if liquids and gases.
• drag and lift force are dynamic fluid forces.
• these two forces have an effect on a variety of sports such as cycling and sprinting.