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Work, Power And Energy — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceWork, Power And Energy1 Mark
MCQ
Which of the following energy change involves frictional force?
  • A
    Chemical energy to heat energy.
  • ✓
    Kinetic energy to heat energy.
  • C
    Potential energy to sound energy.
  • D
    Chemical energy to kinetic energy.
✓

Answer

Correct option: B.
Kinetic energy to heat energy.
Frictional force is responsible for heating up of the tires of a moving vehicle. In such a situation, kinetic energy is converted into heat energy due to the frictional force.

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