NCERT Class 8 Science Chapter 9 Friction VSAQs

NCERT Class 8 Science Chapter 9 Friction VSAQs

Question 1. Why is it difficult to move on a wet marble floor?
Answer: On a wot marble Door, the frictional force between the foot and Door decreases to make it slippery, thus we feel difficult to move on a wet wooden marble floor.

NCERT Solutions for Friction VSAQs Class 8

Question 2. State the reason why we slip when we step on a banana peel.
Answer: As we step on a banana peel, there is no grip between our foot and the banana peel due to very less friction. So, we slipped accidentally.

Question 3. Is the friction the same for all the surfaces?
Answer: No, because friction depends on the nature surface in contact.

Question 5. Can you imagine being able to walk at all if there were no friction?
Answer: No, we can’t walk at all if there is no friction.

Question 6. Could you write, if there were no friction between
Answer: No, we wouldn’t be able to write on a blackboard if there were no friction between the chalk and the board.

Question 7. How do you feel if you vigorously rub your palms together for a few minutes?
Answer: We will feel that our hands feel warm. This warmth is caused by a force called friction.

NCERT Solutions for Class 8 Science Friction VSAQs

Question 8. Have you ever thought why the sole of your shoe is grooved?
Answer: It is done to provide the shoes better grip. The groove on shoes increases the friction between the shoes and the floor.

Question 9. Why do you sprinkle fine powder on the carrom board?
Answer: Powder is sprinkled on the carrom board to reduce friction.

Question 10. The pieces of luggage were fitted with the rollers. Explain why?
Answer: To reduce friction, pieces of luggage are fitted with rollers so that even a child can pull the luggage easily.

NCERT Solutions for Friction Chapter 9 VSAQs

Question 11. Can we reduce friction to zero by polishing surfaces or using a large amount of lubricant?
Answer: No, friction can never be eliminated. Some irregularities are always there.

Question 12. Where do you think scientists got hints for the streamlined shapes?
Answer: Scientists got hints for the streamlined shapes from the body shapes of birds and fishes who have to move about in fluids all the time.

Question 13. Do you find any similarity in the shape of an aeroplane and that of a bird?
Answer: Yes, both have streamlined bodies, which help them to move easily through fluid.