Drag and terminal velocity 3.2.3

Question 1

Define drag

Answer 1

The fricitional force experienced by an object travelling through a fluid

Question 2

5 factors that affect drag

Answer 2

1. density of fluid
2. shape of object
3. texture of surface of object
4. velocity of object
5. cross sectional area of object

Question 3

What 2 factors of drag give the Drag Coefficient

Cd

Answer 3

shape of object

and

texture of surface of object

= Cd

Question 4

What is a fluid

Answer 4

liquid or gas

Question 5

Does Cd have dimensions

Answer 5

no its dimensionless

Question 6

How do you calculate the drag force, give equation and also state the meaning of each variable

Answer 6

F = 1/2 P Cd AV^2

P is the density of fluid
Cd is the shape and texture
A is the cross sectional area
V is the velocity

Question 7

What happens to drag force if velocity is x2

Answer 7

The drag force becomes 4x