# Speed

Forces and Motion
Lesson 06.
TURNING FORCES
1 / 32
Slide 1: Tekstslide
PhysicsSecondary EducationAge 13

In deze les zitten 32 slides, met interactieve quizzen en tekstslides.

## Onderdelen in deze les

Forces and Motion
Lesson 06.
TURNING FORCES

#### Slide 1 -Tekstslide

How are you today?
😒🙁😐🙂😃

#### Slide 2 -Poll

Highlights of the Day
• describe the effects of balanced and unbalanced forces on motion
• calculate speed (speed = distance / time)
• Value :  Responsibility

#### Slide 4 -Tekstslide

timer
1:00
What is the speed limits
for cars in Cambodia?

#### Slide 5 -Woordweb

There are many different units of speed.
TRUE
FALSE

#### Slide 6 -Poll

Forces and Motion
Lesson 04.
SPEED

#### Slide 7 -Tekstslide

Units of Speed
knots  ( example: 5 knots )          -  for ships
Mach   ( example: 5000 Mach)   -  for aeroplanes
kilometers per hour  (example: 5 km/hr)  - roads
miles per hour  (example: 500 miles/hr)  - roads
The problem:
confusion as to what will be used

#### Slide 8 -Tekstslide

Which of the following do scientists use as "standard unit for speed"?
A
meters per hour
B
meters per second
C
miles per second
D
miles per hour

#### Slide 9 -Quizvraag

In 50 meters "per" second, what does "per" mean?
A
in all
B
in each
C
multiply
D

#### Slide 10 -Quizvraag

What does "meters per second" mean?
A
the number of meters travelled in one second
B
the number of seconds in one meter
C
the number of meters in a straight line
D
one meter per one second

#### Slide 11 -Quizvraag

What do you mean by "5 meters per second"?
A
the object travels a distance of 15 meters in each second
B
the object travels a distance of 15 seconds in each distance

#### Slide 12 -Quizvraag

How do you write "meters per second"?
A
ms
B
m/s
C
msp
D
s/m

QUESTION TIME!

#### Slide 14 -Tekstslide

Calculating Speed

#### Slide 15 -Tekstslide

Equation for Speed

#### Slide 17 -Tekstslide

What does it mean by "average speed"?
A
The speed of an object during a journey is NOT always constant.
B
The speed of an object during a journey is always constant.

#### Slide 18 -Quizvraag

Steps in Calculating Speed
• Read and analyse the problem.
• Underline all the numbers with its units.
• Identify the formula.
• Identify what you the problem is looking for.
• Substitute all the numbers and units in the formula.

Practice

#### Slide 20 -Tekstslide

Question 1:
Marcus rides his bicycle at a speed of 5 m/s for 60s. How far does he go in this time?

#### Slide 22 -Tekstslide

Question 2:
Sofia is in a car traveling at a speed of 30 m/s. How long will the car take to travel 2100 m?

#### Slide 24 -Tekstslide

Question 3:
An aeroplane travels 3500 km in a time of 5 hours. What is the speed of the aeroplane in km/h?

#### Slide 26 -Tekstslide

Question 4:
A car travels a distance of 210 m in a time of 6s. Calculate the speed of the car in m/s.

Summary

#### Slide 29 -Tekstslide

Equation for Speed

#### Slide 31 -Tekstslide

Self-survey: Rate your level of understanding and participation in this lesson.
15