Les 15

• Natuurkunde / Scheikunde
• Middelbare school
• havo
• Leerjaar 1

This lesson

• Conclusion dropping something.
• Increasing and decreasing air resistance.
  
• The fall of a skydiver

Goals

• Describe what streamlining means.

• Name ways to increase and decrease air resistance.

•  Explain the fall of a skydiver in terms of  air resistance and falling speed.

Conclusion to 

dropping something

Meting	Mass (kg)	Distance (m)	time (s)	Speed (m/s)
1	0.5 kg	0.7 m	0,3 s	2,3 m/s
2	0.5 kg	0.7 m	0,4 s	1,75 m/s
3	0.5 kg	0.7 m	0,4 s	1,75 m/s
4	0.5 kg	0.7 m	0,3 s	2,3 m/s
5	0.5 kg	0.7 m	0,4 s	1,75 m/s

Meting	Mass (kg)	Distance (m)	time (s)	Speed (m/s)
1	0.5	0.7	0,3	2,3
2	0.5	0.7	0,4	1,75
3	0.5	0.7	0,4	1,75
4	0.5	0.7	0,3	2,3
5	0.5	0.7	0,4	17,5

Streamlining?

Which is more streamlined?

A

B

Which is more streamlined?

A

B

Which is more streamlined?

A

B

Exercise

1. Explain streamlining in your own words.

2. Come up with at least two others examples of streamlining from real life.

Stream lining

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

• Low to the ground.
• Small surface area.

Increase air resistance:

Make the surface area larger

Decrease air resistance:

Make the surface area Smaller

Important

• Air resistance makes you speed up at a slower rate.

• Speeding up increases air resistance. 

Homework

Watch the video about the fall of a skydiver at home.

Do: Textbook, § 1.6, yellow block question 2.

Goals

• Describe what streamlining means.

• Name ways to increase and decrease air resistance.

•  Explain the fall of a skydiver in terms of  air resistance and falling speed.