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Friction — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceFriction1 Mark
MCQ
A mechanical system produces heat energy because of.
  • A
    Radiation
  • B
    Convection
  • C
    Lubrication
  • ✓
    Friction
✓

Answer

Correct option: D.
Friction
In a mechanical system, friction opposes motion between different parts of the system. Work is done against these frictional forces. Hence, heat energy is produced by the system.

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