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Mechanical Properties of Solids — Physics STD 11 Science — Question

Maharashtra BoardEnglish MediumSTD 11 SciencePhysicsMechanical Properties of Solids2 Marks
Question
Friction is a necessary evil.
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Answer

  1. Friction helps us to walk, hold objects in hand, lift objects and without friction we cannot walk, we cannot grip or hold objects with our hands,
  2. Friction is responsible for wear and tear of various part of machines, it produces heat in different parts of machine and also produces noise but it also helps in ball bearing or connecting screws.
    Hence, friction is said to be a necessary evil because it is useful as well as harmful.

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