# Lesson 3 — doing calculations

TTO 2 – Science
Period 1 — Speed
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Slide 1: Tekstslide
SpeedMiddelbare schoolhavo, vwoLeerjaar 2

In deze les zitten 12 slides, met tekstslides.

## Onderdelen in deze les

TTO 2 – Science
Period 1 — Speed

#### Slide 1 -Tekstslide

This lesson
•  Discussing the homework
• Rearranging the formula for speed
• Doing calculations
• Start paragraph 4.2

#### Slide 2 -Tekstslide

Goals
• Be able to rearrange the formula for speed
• Name the steps to use when doing a calculation
• Explain what is meant by average speed, and be able to exercise it

• Apply the formula for speed in calculations, including having to rearrange it

The homework

#### Slide 4 -Tekstslide

Rearranging the formula for speed

#### Slide 5 -Tekstslide

The formula for speed
Speed=timedistance
v=td
• speed (v) – m/s
• distance (d) – m
•  time (t) – s

#### Slide 6 -Tekstslide

Doing calculations
While doing calculations, go through the following steps:
•  Given
• Formula
• Calculate
• Check

#### Slide 7 -Tekstslide

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 8 -Tekstslide

Average speed
avaragespeed=totaltimetotaldistance

#### Slide 9 -Tekstslide

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.
avaragespeed=totaltimetotaldistance

#### Slide 10 -Tekstslide

Worksheet calculations speed

#### Slide 11 -Tekstslide

Goals
• Be able to rearrange the formula for speed
• Name the steps to use when doing a calculation
• Explain what is meant by average speed, and be able to exercise it

• Apply the formula for speed in calculations, including having to rearrange it