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Natuurkunde / ScheikundeMiddelbare schoolhavoLeerjaar 1

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Slide 1 - Diapositive

Todays lesson
  • The homework
  • What is friction
  • Working independently

Slide 2 - Diapositive

Goals
  • Explain friction in your own words. (unit, cause, direction)
  • Give examples of how we use friction.
  • Explain how to reduce friction.

Slide 3 - Diapositive

The homework
1. Balanced/Unbalanced
2. Balanced/Unbalanced
3. 
a) Balanced/Unbalanced
b) Balanced/Unbalanced
c) Balanced/Unbalanced
What word fits each situation best?
Moving at a constant velocity
Accelerating
Decelerating

Slide 4 - Diapositive

The homework
1. Unbalanced
2. Balanced/Unbalanced
3. 
a) Balanced/Unbalanced
b) Balanced/Unbalanced
c) Balanced/Unbalanced
What word fits each situation best?
Moving at a constant velocity
Accelerating
Decelerating

Slide 5 - Diapositive

The homework
1. Unbalanced
2. Balanced
3. 
a) Balanced/Unbalanced
b) Balanced/Unbalanced
c) Balanced/Unbalanced
What word fits each situation best?
Moving at a constant velocity
Accelerating
Decelerating

Slide 6 - Diapositive

The homework
1. Unbalanced
2. Balanced
3. 
a) Balanced
b) Balanced/Unbalanced
c) Balanced/Unbalanced
What word fits each situation best?
Moving at a constant velocity
Accelerating
Decelerating

Slide 7 - Diapositive

The homework
1. Unbalanced
2. Balanced
3. 
a) Balanced
b) Unbalanced
c) Balanced/Unbalanced
What word fits each situation best?
Moving at a constant velocity
Accelerating
Decelerating

Slide 8 - Diapositive

The homework
1. Unbalanced
2. Balanced
3. 
a) Balanced
b) Unbalanced
c) Unbalanced
What word fits each situation best?
Moving at a constant velocity
Accelerating
Decelerating

Slide 9 - Diapositive

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 10 - Diapositive

What is friction?
  • A type of force
  • Expressed in newtons
  • Acts between two surfaces
  • Acts In the opposite direction of a motion

Slide 11 - Diapositive

Slide 12 - Diapositive

90 N
30 N

Slide 13 - Diapositive

A lot of friction

Very little friction

Slide 14 - Diapositive

A lot of friction

Very little friction

Slide 15 - Diapositive

A lot of friction

Very little friction

Slide 16 - Diapositive

Exercise
Answer the following questions:
1) Give examples of things that require a lot of friction.

2) Give examples of things that require very little friction.

3) How can friction be reduced?

4) How do we make use of friction?

Slide 17 - Diapositive

Homework
Workbook §1.3  Exercise: 
1, 2 and 3

Slide 18 - Diapositive

Goals
  • Explain friction in your own words. (unit, cause, direction)
  • Give examples of how we use friction.
  • Explain how to reduce friction.

Slide 19 - Diapositive

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