Which of the following energy change involves frictional force?
Potential energy to sound energy
Chemical energy to heat energy
Kinetic energy to heat energy
Chemical energy to heat energy
Choose the correct option among the following:
Both i and ii
Only iv
Both ii and iii
Only iii

Academic Physics NCERT Class 9

The change of kinetic energy into heat energy involves frictional force. So statement (iii) is correct.

Therefore, option (d) is correct.

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e

Updated on: 10-Oct-2022

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