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Lesson 4 — More indepth on calculating speed
Lessonplan
Lesson plan
Opening
Class phase
Solo phase
Closing
Learning goals
Mention at the end of the lesson that you will check the homework next lesson
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Slide 1:
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Natuurkunde / Scheikunde
Middelbare school
havo
Leerjaar 1
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Items in this lesson
Lessonplan
Lesson plan
Opening
Class phase
Solo phase
Closing
Learning goals
Mention at the end of the lesson that you will check the homework next lesson
Slide 1 - Slide
Slide 2 - Slide
Lesson plan
Rearranging the formula for speed
Converting km/h <-> m/s
Exercises on calculating speed
Slide 3 - Slide
Goals
Know how to rearrange the formula for speed
Know how to convert km/h <-> m/s
Slide 4 - Slide
Class Phase
Slide 5 - Slide
Speed:
How fast something is moving
Average speed
total distance divided
by total time
Steady speed
Traveling at a constant speed
Slide 6 - Slide
Formula for speed
S
p
e
e
d
=
t
i
m
e
d
i
s
t
a
n
c
e
Slide 7 - Slide
Formula for speed
S
p
e
e
d
=
t
i
m
e
d
i
s
t
a
n
c
e
v
=
t
d
Slide 8 - Slide
Formula for speed
S
p
e
e
d
=
t
i
m
e
d
i
s
t
a
n
c
e
v
=
t
d
v:
velocity
d:
distance
t:
time
Slide 9 - Slide
Rearranging the formula for speed
v
=
t
d
3
=
2
6
Slide 10 - Slide
Rearranging the formula for speed
v
=
t
d
Speed:
Distance:
Time:
Slide 11 - Slide
Rearranging the formula for speed
v
=
t
d
Speed:
Distance:
d
=
v
⋅
t
Time:
Slide 12 - Slide
Rearranging the formula for speed
v
=
t
d
Speed:
Distance:
d
=
v
⋅
t
Time:
t
=
v
d
Slide 13 - Slide
Converting
km/h <-> m/s
Slide 14 - Slide
Exercise
A car travels 72km/h. What is that in m/s?
A cyclist travels 7 m/s. What is that in km/h?
Slide 15 - Slide
Exercise
A car travels 72km/h. What is that in m/s?
In one hour the car travels 72km = 72000 m
One hour = 3600 seconds
So in 3600 seconds it travels 72000 m
Then in 1 second it travels 72000/3600 = 20 m/s
So a speed of 72km/h converts to 20 m/s
Slide 16 - Slide
Exercise
A cyclist travels 7 m/s. What is that in km/h?
The cyclist travels 7 meters in one second
There are 3600 seconds in one hour
So in one hour the cyclist travels 7m x 3600 = 25200m
25200m = 25.2 km. the cyclist travels 25.2 km in on hour.
So a speed of 7 m/s converts to 25km/h.
Slide 17 - Slide
km/h —> m/s
The speed x 1000/3600
m/s —> km/h
The speed x 3600/1000
Slide 18 - Slide
Exercise
Convert a speed of 38 km/h to m/s
Convert a speed of 1.5 m/s to km/h
km/h —> m/s
The speed x 1000/3600
m/s —> km/h
The speed x 3600/1000
Slide 19 - Slide
Exercise
Convert a speed of 38 km/h to m/s = 10.55 m/s
Convert a speed of 1.5 m/s to km/h = 5.4 km/h
km/h —> m/s
The speed x 1000/3600
m/s —> km/h
The speed x 3600/1000
Slide 20 - Slide
Solo Phase
Slide 21 - Slide
Exercises on
calculating speed
Slide 22 - Slide
Goals
Know how to rearrange the formula for speed
Know how to convert km/h <-> m/s
Slide 23 - Slide
Next lesson
Homework:
Complete the worksheet
Slide 24 - Slide
Slide 25 - Slide
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