2.4 graphs and air resistance

SI units
Make a table of the quantities and units in your notebook
Add for each a column with their symbols.
Give an example in which kind of job or situation one could use these quantities.
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Slide 1: Tekstslide
NatuurkundeMiddelbare schoolvwoLeerjaar 2

In deze les zitten 19 slides, met interactieve quizzen, tekstslides en 2 videos.

time-iconLesduur is: 45 min

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SI units
Make a table of the quantities and units in your notebook
Add for each a column with their symbols.
Give an example in which kind of job or situation one could use these quantities.

Slide 1 - Tekstslide

How do you calculate speed?

Slide 2 - Open vraag

When making a graph of the time it takes to go from home to school,
what labels do I put on the axis?
A
x-axis: speed v y-axis: time t
B
x-axis: distance x y-axis: time t
C
x-axis: time t y-axis: speed v
D
x-axis: time t y-axis: distance x

Slide 3 - Quizvraag

Distance-time graph
Now draw this graph in your notebook 
with distance in km on the y-axis
and time in min on the x-asis.
Draw the following:
On the first track I ride 3 km in 15 min at constant speed.
Then I need to wait at a traffic light for 5 min. 
Then I need to speed up and ride 3 km in 10 min. 

Slide 4 - Tekstslide

I cycle 3 km in 15 min,
what is my speed in SI units?

Slide 5 - Open vraag

Calculation tactics
Given:
Asked:
Formula:
Calculation:
Answer:

Slide 6 - Tekstslide

Skill: Reading graphs.
What needs explanation?
A
How are the axes labeled?
B
What is the scale on the axes?
C
What is the slope and shape of the graph?
D
Where does the graph start and end?

Slide 7 - Quizvraag

Which questions are there still about unit 2.3 (acceleration)

Slide 8 - Open vraag

Learning objectives unit 1
- SI units
- Calculating speed using the problem solving procedure.
- Drawing a x,t-graph based on data given / measurements.

Slide 9 - Tekstslide

Video slide

after this: Brian Cox visits the world's biggest vacuum
Free Fall of a Bowling Ball and a set of feathers.

Slide 10 - Tekstslide

6

Slide 11 - Video

00:25
What does vacuum mean?

Slide 12 - Open vraag

01:27
Which object falls fastest
when air resistance
is significant (= plays a role)?
A
The feathers
B
The bowling ball
C
No difference in speed

Slide 13 - Quizvraag

02:28
What do we call
the force on any object near the Earth's surface?

Slide 14 - Open vraag

03:00
Which object falls fastest
when air resistance
is NOT significant (= plays a role)?
A
The feathers
B
The bowling ball
C
No difference in speed

Slide 15 - Quizvraag

03:24
Why is there no difference in speed when the feathers and bowling ball fall now?

Slide 16 - Woordweb

04:41
According to Newton: a freely falling object has a constant acceleration.
A
TRUE
B
FALSE
C
IDK

Slide 17 - Quizvraag

The acceleration of a freely falling object near the Earth
is 10 m/s . It took 15 s for the objects to fall.
a) Calculate the speed with which they hit the bottom.
b) Calculate the height from which they fell.
Tip: Use the average speed.
2

Slide 18 - Open vraag

Slide 19 - Video