11th Class Physics Thermal Properties of Matter / द्रव्य के तापीय गुण Question Bank Thermal Properties of Matter Conceptual Problems

  • question_answer
    Why do the brake drums of a car get heated, when the car moves down a hill at a constant speed?

    Answer:

                    As the car moves down a hill at constant speed, its kinetic energy does not change. But its gravitational potential energy constantly decreases, which gets converted into heat and so the brake drums get heated.


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