Drag and terminal velocity 3.2.3 Flashcards
1
Q
Define drag
A
The fricitional force experienced by an object travelling through a fluid
2
Q
5 factors that affect drag
A
- density of fluid
- shape of object
- texture of surface of object
- velocity of object
- cross sectional area of object
3
Q
What 2 factors of drag give the Drag Coefficient
Cd
A
shape of object
and
texture of surface of object
= Cd
4
Q
What is a fluid
A
liquid or gas
5
Q
Does Cd have dimensions
A
no its dimensionless
6
Q
How do you calculate the drag force, give equation and also state the meaning of each variable
A
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
7
Q
What happens to drag force if velocity is x2
A
The drag force becomes 4x