Lesson 5 — Balanced and unbalance forces

1.2 Balanced and unbalanced
forces
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Slide 1: Tekstslide
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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

Slide 5 - Tekstslide

Slide 6 - Tekstslide

Balanced forces

Slide 7 - Tekstslide

Balanced forces
Unbalanced Forces

Slide 8 - Tekstslide

Slide 9 - Tekstslide

Video — Exercise


  • Acceleration
  • Deceleration
  • Constant velocity
  • Stationary
  • Weight
  • equal
What do the words below mean?
Discuss in pairs and write down your answer

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

Slide 17 - Tekstslide

0

Slide 18 - Video

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

Slide 21 - Tekstslide

Resultant force?

Slide 22 - Tekstslide

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

Slide 30 - Tekstslide