Exercises

1. Smooth and rough surface

Difficulty: easy

2
2. Rolling friction

Difficulty: easy

2
3. Types of surfaces

Difficulty: medium

2
4. Basics of friction

Difficulty: medium

3
5. Causes and effects of friction

Difficulty: medium

3
6. Increasing and reducing friction

Difficulty: medium

4
7. Complete the sentences about friction

Difficulty: medium

4.5
8. Types of friction

Difficulty: medium

4

Tests

1. Training test

Difficulty: easy

6

Teacher content