CBSE 8 Science - Friction - Revision Assignment

1. Why are wheels of vehicles made circular?

2. Why does a matchstick catch fire when rubbed on the rough surface of the box?

3. What is the cause of friction?

4. What is the direction of force of friction acting on a moving object?

5. What is the name of special shape given to objects moving in fluids?

6. Name the types of friction and arrange them in increasing order of friction.

7. How does the friction depend on the nature of the surface?

8. Why is it easier to move the box already in motion than to get it started?

9. Define friction and write its SI unit.

10. Why is it difficult to walk on a wet marble floor.

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