# Lesson 5 — Balanced and unbalance forces

1.2 Balanced and unbalanced
forces
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Slide 1: Tekstslide
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In deze les zitten 30 slides, met tekstslides en 1 video.

## Onderdelen in deze les

1.2 Balanced and unbalanced
forces

#### Slide 1 -Tekstslide

This lesson
•  balanced and unbalanced forces
• A video
•  Resultant force
• Working on exercises

#### Slide 2 -Tekstslide

Goals
• Describe the effects of balanced forces on stationary and moving objects

• Describe the effects of balanced forces on stationary and moving objects

•  Be able to calculate resultant force

#### Slide 3 -Tekstslide

Balanced and unbalanced
forces

#### Slide 4 -Tekstslide

Balanced and unbalanced forces

• When there is a pair of forces
• Pulling in opposite or similar sides

Balanced forces

#### Slide 7 -Tekstslide

Balanced forces
Unbalanced Forces

#### Slide 9 -Tekstslide

Video — Exercise

• Acceleration
• Deceleration
• Constant velocity
• Stationary
• Weight
• equal
What do the words below mean?

#### Slide 10 -Tekstslide

Acceleration
Decceleration
Constant velocity
Stationary
Weight
Equal

#### Slide 11 -Tekstslide

Acceleration
Speeding up
Decceleration
Constant velocity
Stationary
Weight
Equal

#### Slide 12 -Tekstslide

Acceleration
Speeding up
Decceleration
Slowing down
Constant velocity
Stationary
Weight
Equal

#### Slide 13 -Tekstslide

Acceleration
Speeding up
Decceleration
Slowing down
Constant velocity
Traveling at one speed
Stationary
Weight
Equal

#### Slide 14 -Tekstslide

Acceleration
Speeding up
Decceleration
Slowing down
Constant velocity
Traveling at one speed
Stationary
Standing still
Weight
Equal

#### Slide 15 -Tekstslide

Acceleration
Speeding up
Decceleration
Slowing down
Constant velocity
Traveling at one speed
Stationary
Standing still
Weight
The force that pulls you to the earth
Equal

#### Slide 16 -Tekstslide

Acceleration
Speeding up
Decceleration
Slowing down
Constant velocity
Traveling at one speed
Stationary
Standing still
Weight
The force that pulls you to the earth
Equal
Two things being the same

0

#### Slide 19 -Tekstslide

Balanced forces

•  Stationary — remains stationary

• Moving — moves at a steady speed

#### Slide 20 -Tekstslide

Unbalanced forces

• Standing still — Starts moving

• Moving — Accelerates or decelerates

Resultant force?

#### Slide 23 -Tekstslide

Workbook question E
Thrust of the car (N)
Friction (N)
Air resistance (N)
Resultant force (N)
A
1500
700
800
B
3000
500
100
C
1000
600
500
D
2500
900
400

#### Slide 24 -Tekstslide

Workbook question E
Thrust of the car (N)
Friction (N)
Air resistance (N)
Resultant force (N)
A
1500
700
800
0
B
3000
500
100
C
1000
600
500
D
2500
900
400

#### Slide 25 -Tekstslide

Workbook question E
Thrust of the car (N)
Friction (N)
Air resistance (N)
Resultant force (N)
A
1500
700
800
0
B
3000
500
100
2600
C
1000
600
500
D
2500
900
400

#### Slide 26 -Tekstslide

Workbook question E
Thrust of the car (N)
Friction (N)
Air resistance (N)
Resultant force (N)
A
1500
700
800
0
B
3000
500
100
2600
C
1000
600
500
100
D
2500
900
400

#### Slide 27 -Tekstslide

Workbook question E
Thrust of the car (N)
Friction (N)
Air resistance (N)
Resultant force (N)
A
1500
700
800
0
B
3000
500
100
2600
C
1000
600
500
100
D
2500
900
400
1200

#### Slide 28 -Tekstslide

Homework
Workbook exercises of paragraph 1.2

#### Slide 29 -Tekstslide

Goals
• Describe the effects of balanced forces on stationary and moving objects

• Describe the effects of balanced forces on stationary and moving objects

•  Be able to calculate resultant force