Drag and terminal velocity 3.2.3 Flashcards

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1
Q

Define drag

A

The fricitional force experienced by an object travelling through a fluid

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2
Q

5 factors that affect drag

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

What 2 factors of drag give the Drag Coefficient

Cd

A

shape of object

and

texture of surface of object

= Cd

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4
Q

What is a fluid

A

liquid or gas

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5
Q

Does Cd have dimensions

A

no its dimensionless

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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

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7
Q

What happens to drag force if velocity is x2

A

The drag force becomes 4x

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