1.6 Air resistance

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

Air resistance

Lesson Plan

• Check worksheet gravity
  
• 1.6 Air resistance
• Working independently

Goals

• discuss your answers to the worksheet
• What is air resistance?
• How to reduce air resistance?
•  Explain streamlining
• Explain terminal velocity 

Check worksheet gravity

1. One of you gets an answer sheet

2. Compare your answers to those of your neighbour and the worksheet.

Check worksheet gravity

1. One of you gets an answer sheet

2. Compare your answers to those of your neighbour and the worksheet.

Done? 

Read 1.6 and start with the yellow block questions

Air resistance

Air resistance — Exercise

Read 1.6 — Answer the following questions:

1) What is air resistance?

a) How does it effect motion?

b) What causes air resistance to increase or decrease?

c) Name 3 examples of Air resistance.

2)What is streamlining?

3)explain terminal velocity.

two pieces of paper. 

one crumbled, one plat.

Drop them at the same time.

Air resistance — Exercise

1) What is air resistance?

two pieces of paper. 

one crumbled, one plat.

Drop them at the same time.

Air resistance:

Air particles resisting the motion of an object.

Air resistance — Exercise

a) How does it affect motion?

• It makes you speed up at a slower rate.
  
• It causes you to reach a lower final speed.

b) What causes air resistance to increase/decrease?

•  The speed you are travelling at.
•  The surface area of an object.

c) Name 3 examples of Air resistance.

two pieces of paper. 

one crumbled, one plat.

Drop them at the same time.

How does air resistance effect you when you cycle?

• It makes you speed up at a slower rate.

• It causes you to reach a lower final speed.

How does the speed you are travelling at effect air resistance?

The faster you travel,

the greater the air resistance.

Important

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

• Speeding up increases air resistance. 

What is Streamlining?

Streamlining

Is reducing air resistance by  changing the form of an object.

• Bending forward.
• Small surface area.

Video: Falling of a sky diver

After viewing the video Answer the following questions.

Question 1

• What force makes her fall down?

• What will happen to her speed? Explain.

Question 2

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

• What will this do to her falling speed?

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?

Question 4

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

• What will this do to her speed? Explain. 

Homework

• Yellow block + workbook exercises