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Home/ Questions/Q 3479
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Jhalak
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Jhalak
Asked: November 22, 20202020-11-22T06:08:56+00:00 2020-11-22T06:08:56+00:00In: Class 8 Science

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

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NCERT Solutions for Class 8 Science Chapter 12
Important NCERT Questions
8th Chapter 12 Friction
NCERT Books for Session 2020-2021
CBSE Board and State Board
Questions No: 9

2020-2021cbsechapter 12class 8 scienceclass8frictionncertscience
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    1. Rushil
      2020-11-22T06:22:04+00:00Added an answer on November 22, 2020 at 6:22 am

      Friction is both a friend and a foe due to following reasons:
      Friction act as friend:
      • We are able to walk because of frictional forces between ground and our feet.
      • We are able to write because of friction between ball point and the paper surface.
      • Nails and screws stick to wall surfaces because of friction.
      • Lighting a match stick is because of friction between match stick and the side surface of match box.
      Friction act as foe:
      • Wear and tear of soles of our shoes is due to friction.
      • When a tyre deflates, it is difficult to move the vehicle because of increased friction between the tyre and road surface.
      • Machines gets heated up because of friction.
      • Due to friction, machines and vehicles consumes more fuel and increase maintenance cost.

      https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-12/

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