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Lesson 3 — doing calculations
TTO 2 – Science
Chapter 4. Speed
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Speed
Middelbare school
havo, vwo
Leerjaar 2
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TTO 2 – Science
Chapter 4. Speed
Slide 1 - Slide
Learning goals
You can explain the difference between steady and average speed.
You can name the formula for speed.
You can rearrange the formula for speed.
You can use the formula for speed to do different kinds of calculations.
Slide 2 - Slide
What is speed?
Slide 3 - Slide
The highest speed possible in the universe?
Slide 4 - Slide
The speed of light!
Slide 5 - Slide
The speed of light!
About 300 000 000 m/s
About 300 000 km/s
To be precise:
299 792 458 m / s
In physics its is given the symbol 'c'
Slide 6 - Slide
Speed
S
p
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d
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D
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New physical quantity:
Speed
Unit of Speed:
m/s
Km/h
Formula
v: speed (meters/second) m/s)
d: distance (meters) (m)
t: time (seconds) (s)
The amount of distance something is traveling over a certain time.
Examples:
A runner is running at a speed of 3/ms
A car on the highway is driving at a speed of 120 km/h
Slide 7 - Slide
Doing calculations
When doing calculations, use the following steps:
Given
Asked
Formula
Calculate
Slide 8 - Slide
Exercise
The space-x rocket called Falcon 9 travels at a speed of 5950 km/h. calculate how many kilometers it would travel in 2,5 days.
Slide 9 - Slide
Average speed and steady speed
steady speed:
A consistent speed over time.
Average speed:
The average speed over a certain amount of time.
Slide 10 - Slide
Average speed
a
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Slide 11 - Slide
Exercise
Two friends go on a road trip for three days.
On the first day they travel 765 km in 8,5 hours.
On the second day they travel 660 km in 6 hours.
On the third day they travel 630 km in 9 hours.
Calculate their average speed.
a
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Slide 12 - Slide
Homework
Worksheet calculations speed
Exercise 1 - 5
Slide 13 - Slide
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