les 15

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

Air resistance

Terminal velocity

Goals

• Describe air resistance and its effect on motion.

•  Name ways to reduce and increase air resistance.

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

An experiment

Experiment

1. Predict which one will hit the floor first. Explain.
2. Drop both from the same height at the same time. Observe what happens.
3. Which actually hit the floor first?
4. How can you explain the difference in falling speed?

Quizz

Questions about air resistance

lessonup.com

Describe air resistance in your own words

Air resisting the motion of an object.

 

Give 3 examples of situations where you can see, feel or hear air resistance.

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 travel 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. 

00:14

Question 1

• What force makes her fall down?

• What will happen to her speed? Explain.

00:30

Question 2

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

• What will this do to her falling speed?

00:41

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?

01:00

Question 5

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

• What will this do to her speed? Explain. 

01:25

Question 6

• What will slowing down do to the air resistance acting on her?

Goals

• Describe air resistance and its effect on motion.

•  Name ways to reduce and increase air resistance.

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

Homework:

The workbook §1.6 —  Question 1, 2 and 3