# Y2_T4_LSN4.2

KWIZL: ET_Y2_4.1
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Slide 1: Tekstslide
ScienceMiddelbare schoolhavo, vwoLeerjaar 2

In deze les zitten 12 slides, met interactieve quizzen en tekstslides.

Lesduur is: 90 min

## Onderdelen in deze les

KWIZL: ET_Y2_4.1
timer
10:00

#### Slide 1 -Tekstslide

§4.2 Speed

p. 162-165
ex 12-21 p 166-171

#### Slide 2 -Tekstslide

§4.2 - Learning Goals:
• I can describe the concept of speed and understand which measurements and units are necessary to calculate it.
• I can calculate the speed (or distance or time) of an object using the speed formula.
• I can convert speed between the units of m/s and km/h.
• I can create and interpret s,t-diagrams relating to an object’s motion.

P.162-165

§4.2 - Keywords:
• Speed
• s,t-diagram

P.162-165

#### Slide 4 -Tekstslide

Speed:
The speed (velocity) of an object tells us how far something moves in a given amount of time. It is calculated with this formula:
P.162-165

#### Slide 5 -Tekstslide

Calculating time & distance:
If you know the speed (v) you can also calculate the time (t) or distance (s) with these formulas

• s = v ᐧ t (distance = speed * time)

• t = s/v (time = distance/speed)

P.162-165

#### Slide 6 -Tekstslide

Units:
calculated in m/s or km/h.

make sure that your measurements are either:
meters and seconds
kilometers and hours

P.162-165

#### Slide 7 -Tekstslide

Converting units:
It is often useful to convert from m/s ↔ km/h
This can be done by either multiplying or dividing by 3.6

P.162-165

#### Slide 8 -Tekstslide

Tom rides his bike to school. Look at the graph from point A until he arrives at school.
What is his average speed in km/h?
And in m/s?

#### Slide 9 -Open vraag

A sprinter runs a 200 m race with a speed of 9.3 m/s. How long did it take her?

#### Slide 10 -Open vraag

Graphing changes in motion:
A graph is an easy way to show an objects changing motion over time. Take a look at the example below:

P.162-165

#### Slide 11 -Tekstslide

Hw for lesson 2:
• Complete exercises 12-21 of §4.2 pages 166-171