Fluid mechanics- Drag

Question 1

What is fluid mechanics?

Answer 1

Fluid mechanics is the study of fluids (gases and Liquids) and how forces affect them

Question 2

What are fluid dynamics?

Answer 2

Fluid dynamics is a part of fluid mechanics and are affected by fluid forces

Question 3

What are fluid forces?

Answer 3

drag and lift

Question 4

What sports do fluid forces have effects on?

Answer 4

cycling, swimming and sprinting and can affect projectiles such as balls, discus’s and javelins

Question 5

What are drag forces?

Answer 5

-A drag force is a resistance force which slows a body or object down
-It acts in the opposite direction to movement it has a negative effect on velocity

Question 6

What are the two types of drag you need to know?

Answer 6

Surface drag (skin drag)
Form drag (shape drag)

Question 7

What is surface/skin drag?

Answer 7

Caused by friction when the fluid environment passes over the surface of an object or the body

Question 8

What is form/shape drag?

Answer 8

How the size and shape of an object/body can affect how water/air pass over it

Question 9

What do the forces effect that influences drag?

Answer 9

Forces that affect the leading edge increase drag
Forces that affect the trailing edge reduce drag

Question 10

What is streamlining?

Answer 10

Altering a body/object so that it passes through the air/water more efficiently

Question 11

What is Drafting in cycling?

Answer 11

A large form drag also offers less turbulent air for anything that follows this is called a slipstream

Question 12

What are factors that increase and reduce drag?

Answer 12

1. the velocity of the moving object
2. The cross sectional area of the moving body
3. The shape and surface characteristics of the moving body