Lesson 12 — Air resistance

• Forces
• Middelbare school
• havo, vwo
• Leerjaar 1

Air resistance

Lesson plan

• Air reisstance demonstration
• Streamlining
  
• Using air resistance
• Terminal velocity
  

Learning goals

• Explain what streamlining is and how it works in your own words.
  

• Give examples of streamlining.

• Describe the fall of a skydiver in your own words.

• Explain what is meant by terminal velocity.

Demonstration

Streamlining

& 

Using air reisstance

Stream lining

To form an object in a way that reduces air resistance.

• Low to the ground.
• Small surface area.

Wind tunnel

Streamlining

Increase air resistance

make surface area larger

Decrease air resistance

make surface area smaller

Exercise

• Come up with two examples of streamlining
  

• Come up with two examples of using air resistance
  

Start video at 1:17

Learning goals

• Explain what streamlining is and how it works in your own words.
  

• Give examples of streamlining.

• Describe the fall of a skydiver in your own words.

• Explain what is meant by terminal velocity.

01:26

Question 1

• What force makes her fall down?

• What will happen to her speed? Explain.

01:38

Question 2

• What will happen to the air resistance as her speed increases?

• What will this do to her falling speed?

01:52

Question 3

• Air resistance and gravity are balanced. What does this mean for her falling speed?

•  How does the graph in the book call this phase?

02:12

Question 4

• How will pulling out her parachute effect the air resistance?

• What will this do to her speed? Explain. 

02:28

Question 5

• How will the increase in air resistance affect her speed?
  

•  What will happen to her air resistance because of this?