SELECT * FROM question_mgmt as q WHERE id=6433 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=12 AND subId=16 AND chapterId=375 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 8th science Friction give examples to show that friction is both a frie

Question:

Give examples to show that friction is both a friend and a foe.

Answer:

Advantages of friction are as follows:

  1. We are able to walk.
  2. We can write.
  3. Friction is used to stop the vehicle.
  4. It produces heat.
  5. Helps in different types of motion.

Disadvantages of friction are as follows:

  1. Forest fires occurs due to friction between branches of trees.
  2. It is an opposing force, so energy is needed to overcome it.
  3. Tyres and soles of shoes tears out.
  4. Damage machines.
  5. It produces a lot of heat.


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  • Answered by Ekta Mehta
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