A toy car is pushed and it travels across a carpeted floor until it stops. Which of the following correctly describes the energy changes and the forces involved?
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Worked Solution
Step 1: The moving car has kinetic energy.
Step 2: Friction between the wheels and the carpet opposes motion.
Step 3: Friction converts the car's kinetic energy into heat energy (and some sound).
Step 4: This follows the Law of Conservation of Energy.
Correct answer: Kinetic energy is converted to heat energy due to friction.
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