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: Slide
Natuurkunde / ScheikundeMiddelbare schoolhavoLeerjaar 1

This lesson contains 25 slides, with text slides.

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
Speed=timedistance

Slide 7 - Slide

Formula for speed
Speed=timedistance
v=td

Slide 8 - Slide

Formula for speed
Speed=timedistance
v=td
v: velocity
d: distance
t: time

Slide 9 - Slide

Rearranging the formula for speed
v=td
3=26

Slide 10 - Slide

Rearranging the formula for speed
v=td
Speed: 
Distance:
Time:

Slide 11 - Slide

Rearranging the formula for speed
v=td
Speed: 
Distance:
d=vt
Time:

Slide 12 - Slide

Rearranging the formula for speed
v=td
Speed: 
Distance:
d=vt
Time:
t=vd

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